634275001957 has 4 divisors (see below), whose sum is σ = 634276894636. Its totient is φ = 634273109280.

The previous prime is 634275001937. The next prime is 634275001967. The reversal of 634275001957 is 759100572436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465013522561 + 169261479396 = 681919^2 + 411414^2 .

It is a cyclic number.

It is not a de Polignac number, because 634275001957 - 2²³ = 634266613349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634275001957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634275001907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293568 + ... + 1163929.

It is an arithmetic number, because the mean of its divisors is an integer number (158569223659).

Almost surely, 2^634275001957 is an apocalyptic number.

It is an amenable number.

634275001957 is a deficient number, since it is larger than the sum of its proper divisors (1892679).

634275001957 is a wasteful number, since it uses less digits than its factorization.

634275001957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892678.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 634275001957 in words is "six hundred thirty-four billion, two hundred seventy-five million, one thousand, nine hundred fifty-seven".