55567980 has 72 divisors (see below), whose sum is σ = 181529712. Its totient is φ = 13677696.

The previous prime is 55567979. The next prime is 55568003. The reversal of 55567980 is 8976555.

55567980 is a `hidden beast` number, since 5 + 5 + 567 + 9 + 80 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9534 + ... + 14213.

It is an arithmetic number, because the mean of its divisors is an integer number (2521246).

Almost surely, 2^55567980 is an apocalyptic number.

It is an amenable number.

55567980 is an abundant number, since it is smaller than the sum of its proper divisors (125961732).

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

55567980 is a wasteful number, since it uses less digits than its factorization.

55567980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23775 (or 23770 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 55567980 is about 7454.3933354767. The cubic root of 55567980 is about 381.5998569413.

The spelling of 55567980 in words is "fifty-five million, five hundred sixty-seven thousand, nine hundred eighty".