621315001634 has 16 divisors (see below), whose sum is σ = 937621147320. Its totient is φ = 308779196160.

The previous prime is 621315001631. The next prime is 621315001661. The reversal of 621315001634 is 436100513126.

It can be written as a sum of positive squares in 4 ways, for example, as 495470986609 + 125844015025 = 703897^2 + 354745^2 .

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 621315001634.

It is not an unprimeable number, because it can be changed into a prime (621315001631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872237 + ... + 1415424.

Almost surely, 2^621315001634 is an apocalyptic number.

621315001634 is a deficient number, since it is larger than the sum of its proper divisors (316306145686).

621315001634 is a wasteful number, since it uses less digits than its factorization.

621315001634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288485.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 621315001634 in words is "six hundred twenty-one billion, three hundred fifteen million, one thousand, six hundred thirty-four".