64664607049 has 16 divisors (see below), whose sum is σ = 78094742400. Its totient is φ = 52305260544.

The previous prime is 64664607031. The next prime is 64664607061. The reversal of 64664607049 is 94070646646.

It is a cyclic number.

It is not a de Polignac number, because 64664607049 - 2⁷ = 64664606921 is a prime.

It is a super-2 number, since 2×64664607049² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64664606987 and 64664607005.

It is not an unprimeable number, because it can be changed into a prime (64664604049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 911734 + ... + 980095.

It is an arithmetic number, because the mean of its divisors is an integer number (4880921400).

Almost surely, 2^64664607049 is an apocalyptic number.

It is an amenable number.

64664607049 is a deficient number, since it is larger than the sum of its proper divisors (13430135351).

64664607049 is a wasteful number, since it uses less digits than its factorization.

64664607049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892112.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 64664607049 in words is "sixty-four billion, six hundred sixty-four million, six hundred seven thousand, forty-nine".