424640837665 has 32 divisors (see below), whose sum is σ = 557121245184. Its totient is φ = 308148234240.

The previous prime is 424640837623. The next prime is 424640837711. The reversal of 424640837665 is 566738046424.

It is not a de Polignac number, because 424640837665 - 2²⁹ = 424103966753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91181017 + ... + 91185673.

It is an arithmetic number, because the mean of its divisors is an integer number (17410038912).

Almost surely, 2^424640837665 is an apocalyptic number.

It is an amenable number.

424640837665 is a deficient number, since it is larger than the sum of its proper divisors (132480407519).

424640837665 is a wasteful number, since it uses less digits than its factorization.

424640837665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977.

The product of its (nonzero) digits is 23224320, while the sum is 55.

The spelling of 424640837665 in words is "four hundred twenty-four billion, six hundred forty million, eight hundred thirty-seven thousand, six hundred sixty-five".