637140538612 has 12 divisors (see below), whose sum is σ = 1118963901636. Its totient is φ = 317436566720.

The previous prime is 637140538607. The next prime is 637140538709. The reversal of 637140538612 is 216835041736.

It can be written as a sum of positive squares in 2 ways, for example, as 212148675216 + 424991863396 = 460596^2 + 651914^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283424383 + ... + 283426630.

It is an arithmetic number, because the mean of its divisors is an integer number (93246991803).

Almost surely, 2^637140538612 is an apocalyptic number.

It is an amenable number.

637140538612 is a deficient number, since it is larger than the sum of its proper divisors (481823363024).

637140538612 is a wasteful number, since it uses less digits than its factorization.

637140538612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566851298 (or 566851296 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 637140538612 in words is "six hundred thirty-seven billion, one hundred forty million, five hundred thirty-eight thousand, six hundred twelve".