51977006420 has 24 divisors (see below), whose sum is σ = 109821362784. Its totient is φ = 20663250336.

The previous prime is 51977006399. The next prime is 51977006447. The reversal of 51977006420 is 2460077915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7968674 + ... + 7975193.

It is an arithmetic number, because the mean of its divisors is an integer number (4575890116).

Almost surely, 2^51977006420 is an apocalyptic number.

It is an amenable number.

51977006420 is an abundant number, since it is smaller than the sum of its proper divisors (57844356364).

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

51977006420 is a wasteful number, since it uses less digits than its factorization.

51977006420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15944039 (or 15944037 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 51977006420 in words is "fifty-one billion, nine hundred seventy-seven million, six thousand, four hundred twenty".