55566110640 has 40 divisors (see below), whose sum is σ = 172254943728. Its totient is φ = 14817629440.

The previous prime is 55566110617. The next prime is 55566110647. The reversal of 55566110640 is 4601166555.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55566110647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115762491 + ... + 115762970.

Almost surely, 2^55566110640 is an apocalyptic number.

It is an amenable number.

55566110640 is an abundant number, since it is smaller than the sum of its proper divisors (116688833088).

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

55566110640 is a wasteful number, since it uses less digits than its factorization.

55566110640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231525477 (or 231525471 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 55566110640 in words is "fifty-five billion, five hundred sixty-six million, one hundred ten thousand, six hundred forty".