51508156216 has 32 divisors (see below), whose sum is σ = 105370729200. Its totient is φ = 23409879040.

The previous prime is 51508156201. The next prime is 51508156243. The reversal of 51508156216 is 61265180515.

51508156216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 775320 + ... + 839128.

Almost surely, 2^51508156216 is an apocalyptic number.

It is an amenable number.

51508156216 is an abundant number, since it is smaller than the sum of its proper divisors (53862572984).

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

51508156216 is a wasteful number, since it uses less digits than its factorization.

51508156216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72999 (or 72995 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 51508156216 in words is "fifty-one billion, five hundred eight million, one hundred fifty-six thousand, two hundred sixteen".