55720730625 has 80 divisors (see below), whose sum is σ = 107295154560. Its totient is φ = 25185600000.

The previous prime is 55720730621. The next prime is 55720730647. The reversal of 55720730625 is 52603702755.

It is a happy number.

It is not a de Polignac number, because 55720730625 - 2² = 55720730621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55720730621) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1144275 + ... + 1191975.

It is an arithmetic number, because the mean of its divisors is an integer number (1341189432).

Almost surely, 2^55720730625 is an apocalyptic number.

It is an amenable number.

55720730625 is a deficient number, since it is larger than the sum of its proper divisors (51574423935).

55720730625 is an equidigital number, since it uses as much as digits as its factorization.

55720730625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47820 (or 47805 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 42.

The spelling of 55720730625 in words is "fifty-five billion, seven hundred twenty million, seven hundred thirty thousand, six hundred twenty-five".