51000550611500 has 72 divisors (see below), whose sum is σ = 129570541787232. Its totient is φ = 17485903058400.

The previous prime is 51000550611469. The next prime is 51000550611503. The reversal of 51000550611500 is 511605500015.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51000550611503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1040803064 + ... + 1040852063.

It is an arithmetic number, because the mean of its divisors is an integer number (1799590858156).

Almost surely, 2^{51000550611500} is an apocalyptic number.

51000550611500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51000550611500 is an abundant number, since it is smaller than the sum of its proper divisors (78569991175732).

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

51000550611500 is a wasteful number, since it uses less digits than its factorization.

51000550611500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081655160 (or 2081655141 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 51000550611500 in words is "fifty-one trillion, five hundred fifty million, six hundred eleven thousand, five hundred".