555561117900 has 72 divisors (see below), whose sum is σ = 1786026121040. Its totient is φ = 148149630720.

The previous prime is 555561117887. The next prime is 555561117901. The reversal of 555561117900 is 9711165555.

555561117900 is a `hidden beast` number, since 5 + 5 + 5 + 561 + 11 + 79 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (555561117901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102878989 + ... + 102884388.

Almost surely, 2^555561117900 is an apocalyptic number.

555561117900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

555561117900 is an abundant number, since it is smaller than the sum of its proper divisors (1230465003140).

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

555561117900 is a wasteful number, since it uses less digits than its factorization.

555561117900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205763400 (or 205763387 counting only the distinct ones).

The product of its (nonzero) digits is 236250, while the sum is 45.

The spelling of 555561117900 in words is "five hundred fifty-five billion, five hundred sixty-one million, one hundred seventeen thousand, nine hundred".