51774777132 has 72 divisors (see below), whose sum is σ = 131263537104. Its totient is φ = 15876147456.

The previous prime is 51774777127. The next prime is 51774777143. The reversal of 51774777132 is 23177747715.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 550638 + ... + 637770.

It is an arithmetic number, because the mean of its divisors is an integer number (1823104682).

Almost surely, 2^51774777132 is an apocalyptic number.

51774777132 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51774777132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65631768552).

51774777132 is an abundant number, since it is smaller than the sum of its proper divisors (79488759972).

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

51774777132 is a wasteful number, since it uses less digits than its factorization.

51774777132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87459 (or 87444 counting only the distinct ones).

The product of its digits is 2016840, while the sum is 51.

The spelling of 51774777132 in words is "fifty-one billion, seven hundred seventy-four million, seven hundred seventy-seven thousand, one hundred thirty-two".