71963678138 has 24 divisors (see below), whose sum is σ = 121027483584. Its totient is φ = 31826674800.

The previous prime is 71963678113. The next prime is 71963678141. The reversal of 71963678138 is 83187636917.

It is a super-2 number, since 2×71963678138² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1164578 + ... + 1224813.

It is an arithmetic number, because the mean of its divisors is an integer number (5042811816).

Almost surely, 2^71963678138 is an apocalyptic number.

71963678138 is a deficient number, since it is larger than the sum of its proper divisors (49063805446).

71963678138 is a wasteful number, since it uses less digits than its factorization.

71963678138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389478 (or 2389441 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 59.

The spelling of 71963678138 in words is "seventy-one billion, nine hundred sixty-three million, six hundred seventy-eight thousand, one hundred thirty-eight".