51020507557000 has 128 divisors (see below), whose sum is σ = 119878234594560. Its totient is φ = 20324482675200.

The previous prime is 51020507556983. The next prime is 51020507557039. The reversal of 51020507557000 is 75570502015.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504538444 + ... + 504639556.

It is an arithmetic number, because the mean of its divisors is an integer number (936548707770).

Almost surely, 2^{51020507557000} is an apocalyptic number.

51020507557000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51020507557000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59939117297280).

51020507557000 is an abundant number, since it is smaller than the sum of its proper divisors (68857727037560).

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

51020507557000 is a wasteful number, since it uses less digits than its factorization.

51020507557000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103200 (or 103186 counting only the distinct ones).

The product of its (nonzero) digits is 61250, while the sum is 37.

The spelling of 51020507557000 in words is "fifty-one trillion, twenty billion, five hundred seven million, five hundred fifty-seven thousand".