51871492132 has 6 divisors (see below), whose sum is σ = 90775111238. Its totient is φ = 25935746064.

The previous prime is 51871492117. The next prime is 51871492133. The reversal of 51871492132 is 23129417815.

It can be written as a sum of positive squares in only one way, i.e., 51863685696 + 7806436 = 227736^2 + 2794^2 .

It is not an unprimeable number, because it can be changed into a prime (51871492133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6483936513 + ... + 6483936520.

Almost surely, 2^51871492132 is an apocalyptic number.

It is an amenable number.

51871492132 is a deficient number, since it is larger than the sum of its proper divisors (38903619106).

51871492132 is a wasteful number, since it uses less digits than its factorization.

51871492132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12967873037 (or 12967873035 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The spelling of 51871492132 in words is "fifty-one billion, eight hundred seventy-one million, four hundred ninety-two thousand, one hundred thirty-two".