51136505266 has 192 divisors, whose sum is σ = 106785423360. Its totient is φ = 17902684800.

The previous prime is 51136505227. The next prime is 51136505267. The reversal of 51136505266 is 66250563115.

It is a super-2 number, since 2×51136505266² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51136505267) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 52881115 + ... + 52882081.

It is an arithmetic number, because the mean of its divisors is an integer number (556174080).

Almost surely, 2^51136505266 is an apocalyptic number.

51136505266 is an abundant number, since it is smaller than the sum of its proper divisors (55648918094).

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

51136505266 is a wasteful number, since it uses less digits than its factorization.

51136505266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 51136505266 in words is "fifty-one billion, one hundred thirty-six million, five hundred five thousand, two hundred sixty-six".