40431394578204 has 216 divisors, whose sum is σ = 123516269909760. Its totient is φ = 11530701078624.

The previous prime is 40431394578191. The next prime is 40431394578221. The reversal of 40431394578204 is 40287549313404.

40431394578204 is a `hidden beast` number, since 4 + 0 + 4 + 31 + 39 + 4 + 578 + 2 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 25276557 + ... + 26828475.

Almost surely, 2^{40431394578204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40431394578204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61758134954880).

40431394578204 is an abundant number, since it is smaller than the sum of its proper divisors (83084875331556).

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

40431394578204 is a wasteful number, since it uses less digits than its factorization.

40431394578204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552499 (or 1552478 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 40431394578204 in words is "forty trillion, four hundred thirty-one billion, three hundred ninety-four million, five hundred seventy-eight thousand, two hundred four".