40125569445 has 54 divisors (see below), whose sum is σ = 75345408918. Its totient is φ = 19745526528.

The previous prime is 40125569441. The next prime is 40125569453. The reversal of 40125569445 is 54496552104.

40125569445 is a `hidden beast` number, since 4 + 0 + 1 + 2 + 556 + 94 + 4 + 5 = 666.

It can be written as a sum of positive squares in 9 ways, for example, as 23998347396 + 16127222049 = 154914^2 + 126993^2 .

It is not a de Polignac number, because 40125569445 - 2² = 40125569441 is a prime.

It is a super-2 number, since 2×40125569445² (a number of 22 digits) contains 22 as substring.

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 40125569445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40125569441) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 17467537 + ... + 17469833.

Almost surely, 2^40125569445 is an apocalyptic number.

40125569445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40125569445 is a deficient number, since it is larger than the sum of its proper divisors (35219839473).

40125569445 is an equidigital number, since it uses as much as digits as its factorization.

40125569445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

Multiplying 40125569445 by its sum of digits (45), we get a square (1805650625025 = 1343745²).

40125569445 divided by its sum of digits (45) gives a square (891679321 = 29861²).

The spelling of 40125569445 in words is "forty billion, one hundred twenty-five million, five hundred sixty-nine thousand, four hundred forty-five".