40425664520 has 16 divisors (see below), whose sum is σ = 90957745260. Its totient is φ = 16170265792.

The previous prime is 40425664457. The next prime is 40425664537. The reversal of 40425664520 is 2546652404.

It can be written as a sum of positive squares in 2 ways, for example, as 37622809156 + 2802855364 = 193966^2 + 52942^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505320767 + ... + 505320846.

Almost surely, 2^40425664520 is an apocalyptic number.

40425664520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40425664520 is an abundant number, since it is smaller than the sum of its proper divisors (50532080740).

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

40425664520 is a wasteful number, since it uses less digits than its factorization.

40425664520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010641624 (or 1010641620 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 40425664520 in words is "forty billion, four hundred twenty-five million, six hundred sixty-four thousand, five hundred twenty".