55500500561 has 16 divisors (see below), whose sum is σ = 61789972608. Its totient is φ = 49427414400.

The previous prime is 55500500557. The next prime is 55500500581. The reversal of 55500500561 is 16500500555.

55500500561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55500500561 - 2² = 55500500557 is a prime.

It is a super-2 number, since 2×55500500561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55500500581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103700 + ... + 348933.

It is an arithmetic number, because the mean of its divisors is an integer number (3861873288).

Almost surely, 2^55500500561 is an apocalyptic number.

It is an amenable number.

55500500561 is a deficient number, since it is larger than the sum of its proper divisors (6289472047).

55500500561 is a wasteful number, since it uses less digits than its factorization.

55500500561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452872.

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 55500500561 in words is "fifty-five billion, five hundred million, five hundred thousand, five hundred sixty-one".