51651274416 has 80 divisors (see below), whose sum is σ = 152612565504. Its totient is φ = 14746056192.

The previous prime is 51651274387. The next prime is 51651274453. The reversal of 51651274416 is 61447215615.

It is a super-2 number, since 2×51651274416² (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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378820 + ... + 496796.

Almost surely, 2^51651274416 is an apocalyptic number.

51651274416 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51651274416 is an abundant number, since it is smaller than the sum of its proper divisors (100961291088).

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

51651274416 is a wasteful number, since it uses less digits than its factorization.

51651274416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119298 (or 119292 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The spelling of 51651274416 in words is "fifty-one billion, six hundred fifty-one million, two hundred seventy-four thousand, four hundred sixteen".