40425664521 has 12 divisors (see below), whose sum is σ = 59246428976. Its totient is φ = 24500402520.

The previous prime is 40425664457. The next prime is 40425664537. The reversal of 40425664521 is 12546652404.

It is not a de Polignac number, because 40425664521 - 2⁶ = 40425664457 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40425664521.

It is not an unprimeable number, because it can be changed into a prime (40425662521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55682371 + ... + 55683096.

Almost surely, 2^40425664521 is an apocalyptic number.

It is an amenable number.

40425664521 is a deficient number, since it is larger than the sum of its proper divisors (18820764455).

40425664521 is a wasteful number, since it uses less digits than its factorization.

40425664521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111365492 (or 111365481 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 40425664521 in words is "forty billion, four hundred twenty-five million, six hundred sixty-four thousand, five hundred twenty-one".