42990400565 has 64 divisors (see below), whose sum is σ = 62036029440. Its totient is φ = 27979776000.

The previous prime is 42990400561. The next prime is 42990400639. The reversal of 42990400565 is 56500409924.

It is not a de Polignac number, because 42990400565 - 2² = 42990400561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42990400561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30510581 + ... + 30511989.

It is an arithmetic number, because the mean of its divisors is an integer number (969312960).

Almost surely, 2^42990400565 is an apocalyptic number.

It is an amenable number.

42990400565 is a deficient number, since it is larger than the sum of its proper divisors (19045628875).

42990400565 is a wasteful number, since it uses less digits than its factorization.

42990400565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 42990400565 in words is "forty-two billion, nine hundred ninety million, four hundred thousand, five hundred sixty-five".