64163660655 has 64 divisors (see below), whose sum is σ = 107408793600. Its totient is φ = 32671296000.

The previous prime is 64163660647. The next prime is 64163660657. The reversal of 64163660655 is 55606636146.

It is not a de Polignac number, because 64163660655 - 2³ = 64163660647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64163660657) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10458969 + ... + 10465101.

It is an arithmetic number, because the mean of its divisors is an integer number (1678262400).

Almost surely, 2^64163660655 is an apocalyptic number.

64163660655 is a deficient number, since it is larger than the sum of its proper divisors (43245132945).

64163660655 is a wasteful number, since it uses less digits than its factorization.

64163660655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 64163660655 in words is "sixty-four billion, one hundred sixty-three million, six hundred sixty thousand, six hundred fifty-five".