51451947932 has 24 divisors (see below), whose sum is σ = 112258796160. Its totient is φ = 20046213360.

The previous prime is 51451947889. The next prime is 51451947971. The reversal of 51451947932 is 23974915415.

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, 83525582 + ... + 83526197.

It is an arithmetic number, because the mean of its divisors is an integer number (4677449840).

Almost surely, 2^51451947932 is an apocalyptic number.

It is an amenable number.

51451947932 is an abundant number, since it is smaller than the sum of its proper divisors (60806848228).

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

51451947932 is a wasteful number, since it uses less digits than its factorization.

51451947932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167051801 (or 167051799 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 50.

The spelling of 51451947932 in words is "fifty-one billion, four hundred fifty-one million, nine hundred forty-seven thousand, nine hundred thirty-two".