71872195856 has 10 divisors (see below), whose sum is σ = 139252379502. Its totient is φ = 35936097920.

The previous prime is 71872195711. The next prime is 71872195883. The reversal of 71872195856 is 65859127817.

It can be written as a sum of positive squares in only one way, i.e., 52204938256 + 19667257600 = 228484^2 + 140240^2 .

It is a super-2 number, since 2×71872195856² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71872195795 and 71872195804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2246006105 + ... + 2246006136.

Almost surely, 2^71872195856 is an apocalyptic number.

It is an amenable number.

71872195856 is a deficient number, since it is larger than the sum of its proper divisors (67380183646).

71872195856 is a wasteful number, since it uses less digits than its factorization.

71872195856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492012249 (or 4492012243 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 59.

The spelling of 71872195856 in words is "seventy-one billion, eight hundred seventy-two million, one hundred ninety-five thousand, eight hundred fifty-six".