51120227881878 has 16 divisors (see below), whose sum is σ = 102240637717680. Its totient is φ = 17040045634976.

The previous prime is 51120227881847. The next prime is 51120227881939. The reversal of 51120227881878 is 87818872202115.

It is a super-2 number, since 2×51120227881878² (a number of 28 digits) contains 22 as substring.

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, 3782625 + ... + 10795772.

It is an arithmetic number, because the mean of its divisors is an integer number (6390039857355).

Almost surely, 2^{51120227881878} is an apocalyptic number.

51120227881878 is an abundant number, since it is smaller than the sum of its proper divisors (51120409835802).

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

51120227881878 is a wasteful number, since it uses less digits than its factorization.

51120227881878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15162831.

The product of its (nonzero) digits is 8028160, while the sum is 60.

The spelling of 51120227881878 in words is "fifty-one trillion, one hundred twenty billion, two hundred twenty-seven million, eight hundred eighty-one thousand, eight hundred seventy-eight".