51986971952 has 20 divisors (see below), whose sum is σ = 103447050096. Its totient is φ = 25290959040.

The previous prime is 51986971951. The next prime is 51986971979. The reversal of 51986971952 is 25917968915.

It is not an unprimeable number, because it can be changed into a prime (51986971951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43907324 + ... + 43908507.

Almost surely, 2^51986971952 is an apocalyptic number.

It is an amenable number.

51986971952 is a deficient number, since it is larger than the sum of its proper divisors (51460078144).

51986971952 is a wasteful number, since it uses less digits than its factorization.

51986971952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87815876 (or 87815870 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 62.

The spelling of 51986971952 in words is "fifty-one billion, nine hundred eighty-six million, nine hundred seventy-one thousand, nine hundred fifty-two".