634262005643 has 32 divisors (see below), whose sum is σ = 774143225856. Its totient is φ = 507813834528.

The previous prime is 634262005603. The next prime is 634262005649. The reversal of 634262005643 is 346500262436.

It is not a de Polignac number, because 634262005643 - 2²⁶ = 634194896779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634262005643.

It is not an unprimeable number, because it can be changed into a prime (634262005649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52906496 + ... + 52918482.

It is an arithmetic number, because the mean of its divisors is an integer number (24191975808).

Almost surely, 2^634262005643 is an apocalyptic number.

634262005643 is a deficient number, since it is larger than the sum of its proper divisors (139881220213).

634262005643 is a wasteful number, since it uses less digits than its factorization.

634262005643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19703.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 634262005643 in words is "six hundred thirty-four billion, two hundred sixty-two million, five thousand, six hundred forty-three".