64555555770 has 80 divisors (see below), whose sum is σ = 182718692640. Its totient is φ = 16308768096.

The previous prime is 64555555741. The next prime is 64555555783. The reversal of 64555555770 is 7755555546.

64555555770 is a `hidden beast` number, since 64 + 5 + 5 + 5 + 5 + 5 + 577 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2081932 + ... + 2112711.

It is an arithmetic number, because the mean of its divisors is an integer number (2283983658).

Almost surely, 2^64555555770 is an apocalyptic number.

64555555770 is an abundant number, since it is smaller than the sum of its proper divisors (118163136870).

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

64555555770 is a wasteful number, since it uses less digits than its factorization.

64555555770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194681 (or 4194672 counting only the distinct ones).

The product of its (nonzero) digits is 18375000, while the sum is 54.

The spelling of 64555555770 in words is "sixty-four billion, five hundred fifty-five million, five hundred fifty-five thousand, seven hundred seventy".