51111055474976 has 96 divisors (see below), whose sum is σ = 115917757966080. Its totient is φ = 21730535571456.

The previous prime is 51111055474931. The next prime is 51111055474981. The reversal of 51111055474976 is 67947455011115.

It is a happy number.

It is a super-2 number, since 2×51111055474976² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13873700 + ... + 17166876.

It is an arithmetic number, because the mean of its divisors is an integer number (1207476645480).

Almost surely, 2^{51111055474976} is an apocalyptic number.

51111055474976 is a gapful number since it is divisible by the number (56) 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 51111055474976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57958878983040).

51111055474976 is an abundant number, since it is smaller than the sum of its proper divisors (64806702491104).

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

51111055474976 is a wasteful number, since it uses less digits than its factorization.

51111055474976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293746 (or 3293738 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 56.

The spelling of 51111055474976 in words is "fifty-one trillion, one hundred eleven billion, fifty-five million, four hundred seventy-four thousand, nine hundred seventy-six".