64563193877 has 12 divisors (see below), whose sum is σ = 79899000480. Its totient is φ = 51082965648.

The previous prime is 64563193859. The next prime is 64563193907. The reversal of 64563193877 is 77839136546.

It is not a de Polignac number, because 64563193877 - 2⁶ = 64563193813 is a prime.

It is a super-2 number, since 2×64563193877² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64563196877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27286727 + ... + 27289092.

It is an arithmetic number, because the mean of its divisors is an integer number (6658250040).

Almost surely, 2^64563193877 is an apocalyptic number.

It is an amenable number.

64563193877 is a deficient number, since it is larger than the sum of its proper divisors (15335806603).

64563193877 is a wasteful number, since it uses less digits than its factorization.

64563193877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54575852 (or 54575839 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 59.

The spelling of 64563193877 in words is "sixty-four billion, five hundred sixty-three million, one hundred ninety-three thousand, eight hundred seventy-seven".