55720730626 has 36 divisors (see below), whose sum is σ = 96038371926. Its totient is φ = 24226348960.

The previous prime is 55720730621. The next prime is 55720730647. The reversal of 55720730626 is 62603702755.

It can be written as a sum of positive squares in only one way, i.e., 55719130401 + 1600225 = 236049^2 + 1265^2 .

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 17 ways as a sum of consecutive naturals, for example, 89611 + ... + 345646.

Almost surely, 2^55720730626 is an apocalyptic number.

55720730626 is a deficient number, since it is larger than the sum of its proper divisors (40317641300).

55720730626 is a wasteful number, since it uses less digits than its factorization.

55720730626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435327 (or 435293 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 43.

The spelling of 55720730626 in words is "fifty-five billion, seven hundred twenty million, seven hundred thirty thousand, six hundred twenty-six".