635897798536 has 64 divisors (see below), whose sum is σ = 1600861610880. Its totient is φ = 228694510080.

The previous prime is 635897798527. The next prime is 635897798587.

635897798536 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39695901 + ... + 39711916.

It is an arithmetic number, because the mean of its divisors is an integer number (25013462670).

Almost surely, 2^635897798536 is an apocalyptic number.

It is an amenable number.

635897798536 is an abundant number, since it is smaller than the sum of its proper divisors (964963812344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

635897798536 is a wasteful number, since it uses less digits than its factorization.

635897798536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79407854 (or 79407850 counting only the distinct ones).

The product of its digits is 2057529600, while the sum is 76.

The spelling of 635897798536 in words is "six hundred thirty-five billion, eight hundred ninety-seven million, seven hundred ninety-eight thousand, five hundred thirty-six".