53721632628 has 54 divisors (see below), whose sum is σ = 136705635794. Its totient is φ = 17787380832.

The previous prime is 53721632609. The next prime is 53721632677. The reversal of 53721632628 is 82623612735.

53721632628 is a `hidden beast` number, since 5 + 3 + 7 + 2 + 1 + 632 + 6 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41403296484 + 12318336144 = 203478^2 + 110988^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17423575 + ... + 17426657.

Almost surely, 2^53721632628 is an apocalyptic number.

It is an amenable number.

53721632628 is an abundant number, since it is smaller than the sum of its proper divisors (82984003166).

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

53721632628 is a wasteful number, since it uses less digits than its factorization.

53721632628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6333 (or 3245 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 53721632628 in words is "fifty-three billion, seven hundred twenty-one million, six hundred thirty-two thousand, six hundred twenty-eight".