51987671216 has 40 divisors (see below), whose sum is σ = 109527468960. Its totient is φ = 23761345536.

The previous prime is 51987671209. The next prime is 51987671227. The reversal of 51987671216 is 61217678915.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191881 + ... + 1234728.

It is an arithmetic number, because the mean of its divisors is an integer number (2738186724).

Almost surely, 2^51987671216 is an apocalyptic number.

It is an amenable number.

51987671216 is an abundant number, since it is smaller than the sum of its proper divisors (57539797744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51987671216 is a wasteful number, since it uses less digits than its factorization.

51987671216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426733 (or 2426727 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 53.

The spelling of 51987671216 in words is "fifty-one billion, nine hundred eighty-seven million, six hundred seventy-one thousand, two hundred sixteen".