40245312252645 has 24 divisors (see below), whose sum is σ = 70449219871992. Its totient is φ = 21251650032000.

The previous prime is 40245312252637. The next prime is 40245312252671. The reversal of 40245312252645 is 54625221354204.

40245312252645 is a `hidden beast` number, since 4 + 0 + 2 + 4 + 531 + 2 + 2 + 52 + 64 + 5 = 666.

40245312252645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 18752658628356 + 21492653624289 = 4330434^2 + 4636017^2 .

It is not a de Polignac number, because 40245312252645 - 2³ = 40245312252637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40245312252645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4427422546 + ... + 4427431635.

It is an arithmetic number, because the mean of its divisors is an integer number (2935384161333).

Almost surely, 2^{40245312252645} is an apocalyptic number.

40245312252645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40245312252645 is a deficient number, since it is larger than the sum of its proper divisors (30203907619347).

40245312252645 is a wasteful number, since it uses less digits than its factorization.

40245312252645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8854854293 (or 8854854290 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 45.

The spelling of 40245312252645 in words is "forty trillion, two hundred forty-five billion, three hundred twelve million, two hundred fifty-two thousand, six hundred forty-five".