630540678538 has 16 divisors (see below), whose sum is σ = 998731228320. Its totient is φ = 297734958576.

The previous prime is 630540678473. The next prime is 630540678569. The reversal of 630540678538 is 835876045036.

630540678538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×630540678538² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26160156 + ... + 26184247.

It is an arithmetic number, because the mean of its divisors is an integer number (62420701770).

Almost surely, 2^630540678538 is an apocalyptic number.

630540678538 is a deficient number, since it is larger than the sum of its proper divisors (368190549782).

630540678538 is a wasteful number, since it uses less digits than its factorization.

630540678538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52344741.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 630540678538 in words is "six hundred thirty billion, five hundred forty million, six hundred seventy-eight thousand, five hundred thirty-eight".