64138797877 has 8 divisors (see below), whose sum is σ = 79965254592. Its totient is φ = 49978284000.

The previous prime is 64138797859. The next prime is 64138797907. The reversal of 64138797877 is 77879783146.

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

It is a cyclic number.

It is not a de Polignac number, because 64138797877 - 2¹⁵ = 64138765109 is a prime.

It is a super-2 number, since 2×64138797877² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64138797817) 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, 416485624 + ... + 416485777.

It is an arithmetic number, because the mean of its divisors is an integer number (9995656824).

Almost surely, 2^64138797877 is an apocalyptic number.

It is an amenable number.

64138797877 is a deficient number, since it is larger than the sum of its proper divisors (15826456715).

64138797877 is a wasteful number, since it uses less digits than its factorization.

64138797877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832971419.

The product of its digits is 99574272, while the sum is 67.

The spelling of 64138797877 in words is "sixty-four billion, one hundred thirty-eight million, seven hundred ninety-seven thousand, eight hundred seventy-seven".