64674669864 has 128 divisors (see below), whose sum is σ = 192989952000. Its totient is φ = 17659386624.

The previous prime is 64674669833. The next prime is 64674669881. The reversal of 64674669864 is 46896647646.

It is a super-3 number, since 3×64674669864³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64674669795 and 64674669804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4742047 + ... + 4755665.

It is an arithmetic number, because the mean of its divisors is an integer number (1507734000).

Almost surely, 2^64674669864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64674669864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96494976000).

64674669864 is an abundant number, since it is smaller than the sum of its proper divisors (128315282136).

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

64674669864 is a wasteful number, since it uses less digits than its factorization.

64674669864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14887 (or 14883 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 66.

The spelling of 64674669864 in words is "sixty-four billion, six hundred seventy-four million, six hundred sixty-nine thousand, eight hundred sixty-four".