55515529720 has 32 divisors (see below), whose sum is σ = 142754220000. Its totient is φ = 19033895808.

The previous prime is 55515529687. The next prime is 55515529723. The reversal of 55515529720 is 2792551555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55515529723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99134595 + ... + 99135154.

It is an arithmetic number, because the mean of its divisors is an integer number (4461069375).

Almost surely, 2^55515529720 is an apocalyptic number.

It is an amenable number.

55515529720 is an abundant number, since it is smaller than the sum of its proper divisors (87238690280).

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

55515529720 is a wasteful number, since it uses less digits than its factorization.

55515529720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198269767 (or 198269763 counting only the distinct ones).

The product of its (nonzero) digits is 787500, while the sum is 46.

The spelling of 55515529720 in words is "fifty-five billion, five hundred fifteen million, five hundred twenty-nine thousand, seven hundred twenty".