64646064646 has 16 divisors (see below), whose sum is σ = 97942107888. Its totient is φ = 31998780000.

The previous prime is 64646064547. The next prime is 64646064671.

It is a happy number.

64646064646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×64646064646² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64646064593 and 64646064602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1983841 + ... + 2016163.

It is an arithmetic number, because the mean of its divisors is an integer number (6121381743).

Almost surely, 2^64646064646 is an apocalyptic number.

64646064646 is a deficient number, since it is larger than the sum of its proper divisors (33296043242).

64646064646 is a wasteful number, since it uses less digits than its factorization.

64646064646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42327.

The product of its (nonzero) digits is 11943936, while the sum is 52.

The spelling of 64646064646 in words is "sixty-four billion, six hundred forty-six million, sixty-four thousand, six hundred forty-six".