405238851045 has 64 divisors (see below), whose sum is σ = 823442595840. Its totient is φ = 185229509184.

The previous prime is 405238851019. The next prime is 405238851053. The reversal of 405238851045 is 540158832504.

405238851045 is a `hidden beast` number, since 4 + 0 + 52 + 3 + 88 + 510 + 4 + 5 = 666.

It is not a de Polignac number, because 405238851045 - 2⁶ = 405238850981 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9639762 + ... + 9681708.

It is an arithmetic number, because the mean of its divisors is an integer number (12866290560).

Almost surely, 2^405238851045 is an apocalyptic number.

405238851045 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

405238851045 is an abundant number, since it is smaller than the sum of its proper divisors (418203744795).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405238851045 is a wasteful number, since it uses less digits than its factorization.

405238851045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52191 (or 52185 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 405238851045 in words is "four hundred five billion, two hundred thirty-eight million, eight hundred fifty-one thousand, forty-five".