51356511472 has 80 divisors (see below), whose sum is σ = 120047872000. Its totient is φ = 20791468800.

The previous prime is 51356511467. The next prime is 51356511487. The reversal of 51356511472 is 27411565315.

It is a happy number.

It is a congruent number.

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, 708097 + ... + 777247.

It is an arithmetic number, because the mean of its divisors is an integer number (1500598400).

Almost surely, 2^51356511472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51356511472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60023936000).

51356511472 is an abundant number, since it is smaller than the sum of its proper divisors (68691360528).

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

51356511472 is a wasteful number, since it uses less digits than its factorization.

51356511472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69534 (or 69528 counting only the distinct ones).

The product of its digits is 126000, while the sum is 40.

The spelling of 51356511472 in words is "fifty-one billion, three hundred fifty-six million, five hundred eleven thousand, four hundred seventy-two".