51677072220 has 192 divisors, whose sum is σ = 149466240000. Its totient is φ = 13335404544.

The previous prime is 51677072201. The next prime is 51677072231. The reversal of 51677072220 is 2227077615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76785804 + ... + 76786476.

It is an arithmetic number, because the mean of its divisors is an integer number (778470000).

Almost surely, 2^51677072220 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 51677072220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74733120000).

51677072220 is an abundant number, since it is smaller than the sum of its proper divisors (97789167780).

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

51677072220 is a wasteful number, since it uses less digits than its factorization.

51677072220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The spelling of 51677072220 in words is "fifty-one billion, six hundred seventy-seven million, seventy-two thousand, two hundred twenty".