51170511655220 has 24 divisors (see below), whose sum is σ = 107458254887424. Its totient is φ = 20468170298016.

The previous prime is 51170511655199. The next prime is 51170511655279. The reversal of 51170511655220 is 2255611507115.

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, 12498737 + ... + 16079783.

It is an arithmetic number, because the mean of its divisors is an integer number (4477427286976).

Almost surely, 2^{51170511655220} is an apocalyptic number.

It is an amenable number.

51170511655220 is an abundant number, since it is smaller than the sum of its proper divisors (56287743232204).

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

51170511655220 is a wasteful number, since it uses less digits than its factorization.

51170511655220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295519 (or 4295517 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 41.

The spelling of 51170511655220 in words is "fifty-one trillion, one hundred seventy billion, five hundred eleven million, six hundred fifty-five thousand, two hundred twenty".