64451291879 has 12 divisors (see below), whose sum is σ = 71413493976. Its totient is φ = 58109923872.

The previous prime is 64451291867. The next prime is 64451291893. The reversal of 64451291879 is 97819215446.

64451291879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64451291879 - 2²⁰ = 64450243303 is a prime.

It is a super-3 number, since 3×64451291879³ (a number of 33 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64451291819) 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, 4427252 + ... + 4441785.

It is an arithmetic number, because the mean of its divisors is an integer number (5951124498).

Almost surely, 2^64451291879 is an apocalyptic number.

64451291879 is a deficient number, since it is larger than the sum of its proper divisors (6962202097).

64451291879 is a wasteful number, since it uses less digits than its factorization.

64451291879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8869106 (or 8869093 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The spelling of 64451291879 in words is "sixty-four billion, four hundred fifty-one million, two hundred ninety-one thousand, eight hundred seventy-nine".