64479193769 has 8 divisors (see below), whose sum is σ = 65578883040. Its totient is φ = 63379732000.

The previous prime is 64479193697. The next prime is 64479193787. The reversal of 64479193769 is 96739197446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64479193769 is a prime.

It is a super-2 number, since 2×64479193769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64479193069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573914 + ... + 677004.

It is an arithmetic number, because the mean of its divisors is an integer number (8197360380).

Almost surely, 2^64479193769 is an apocalyptic number.

It is an amenable number.

64479193769 is a deficient number, since it is larger than the sum of its proper divisors (1099689271).

64479193769 is a wasteful number, since it uses less digits than its factorization.

64479193769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113751.

The product of its digits is 61725888, while the sum is 65.

The spelling of 64479193769 in words is "sixty-four billion, four hundred seventy-nine million, one hundred ninety-three thousand, seven hundred sixty-nine".