51118652256 has 48 divisors (see below), whose sum is σ = 153355958784. Its totient is φ = 14605329024.

The previous prime is 51118652203. The next prime is 51118652257. The reversal of 51118652256 is 65225681115.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×51118652256² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51118652257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38034040 + ... + 38035383.

It is an arithmetic number, because the mean of its divisors is an integer number (3194915808).

Almost surely, 2^51118652256 is an apocalyptic number.

51118652256 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51118652256 is an abundant number, since it is smaller than the sum of its proper divisors (102237306528).

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

51118652256 is a wasteful number, since it uses less digits than its factorization.

51118652256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76069443 (or 76069435 counting only the distinct ones).

The product of its digits is 144000, while the sum is 42.

The spelling of 51118652256 in words is "fifty-one billion, one hundred eighteen million, six hundred fifty-two thousand, two hundred fifty-six".