51600821956 has 24 divisors (see below), whose sum is σ = 95636975616. Its totient is φ = 24276723840.

The previous prime is 51600821947. The next prime is 51600821957. The reversal of 51600821956 is 65912800615.

It is not an unprimeable number, because it can be changed into a prime (51600821957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188701 + ... + 372571.

It is an arithmetic number, because the mean of its divisors is an integer number (3984873984).

Almost surely, 2^51600821956 is an apocalyptic number.

It is an amenable number.

51600821956 is a deficient number, since it is larger than the sum of its proper divisors (44036153660).

51600821956 is a wasteful number, since it uses less digits than its factorization.

51600821956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188019 (or 188017 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 51600821956 in words is "fifty-one billion, six hundred million, eight hundred twenty-one thousand, nine hundred fifty-six".