51344874420 has 72 divisors (see below), whose sum is σ = 167237600544. Its totient is φ = 11735970624.

The previous prime is 51344874397. The next prime is 51344874437. The reversal of 51344874420 is 2447844315.

It is a super-2 number, since 2×51344874420² (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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8729182 + ... + 8735061.

It is an arithmetic number, because the mean of its divisors is an integer number (2322744452).

Almost surely, 2^51344874420 is an apocalyptic number.

It is an amenable number.

51344874420 is an abundant number, since it is smaller than the sum of its proper divisors (115892726124).

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

51344874420 is a wasteful number, since it uses less digits than its factorization.

51344874420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17464269 (or 17464260 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 42.

The spelling of 51344874420 in words is "fifty-one billion, three hundred forty-four million, eight hundred seventy-four thousand, four hundred twenty".