64879955811 has 12 divisors (see below), whose sum is σ = 102235082040. Its totient is φ = 39321185280.

The previous prime is 64879955809. The next prime is 64879955821. The reversal of 64879955811 is 11855997846.

64879955811 is a `hidden beast` number, since 6 + 4 + 8 + 79 + 9 + 558 + 1 + 1 = 666.

It is not a de Polignac number, because 64879955811 - 2¹ = 64879955809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64879955821) 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, 327676446 + ... + 327676643.

It is an arithmetic number, because the mean of its divisors is an integer number (8519590170).

Almost surely, 2^64879955811 is an apocalyptic number.

64879955811 is a deficient number, since it is larger than the sum of its proper divisors (37355126229).

64879955811 is a wasteful number, since it uses less digits than its factorization.

64879955811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655353106 (or 655353103 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 63.

The spelling of 64879955811 in words is "sixty-four billion, eight hundred seventy-nine million, nine hundred fifty-five thousand, eight hundred eleven".