51455344136 has 48 divisors (see below), whose sum is σ = 112250135340. Its totient is φ = 22048414080.

The previous prime is 51455344069. The next prime is 51455344151. The reversal of 51455344136 is 63144355415.

It can be written as a sum of positive squares in 2 ways, for example, as 50937781636 + 517562500 = 225694^2 + 22750^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51455344093 and 51455344102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3984506 + ... + 3997398.

Almost surely, 2^51455344136 is an apocalyptic number.

51455344136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51455344136 is an abundant number, since it is smaller than the sum of its proper divisors (60794791204).

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

51455344136 is a wasteful number, since it uses less digits than its factorization.

51455344136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23094 (or 23083 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The spelling of 51455344136 in words is "fifty-one billion, four hundred fifty-five million, three hundred forty-four thousand, one hundred thirty-six".