64877694783 has 32 divisors (see below), whose sum is σ = 94719125760. Its totient is φ = 39173621760.

The previous prime is 64877694769. The next prime is 64877694799. The reversal of 64877694783 is 38749677846.

It is a happy number.

It is not a de Polignac number, because 64877694783 - 2⁶ = 64877694719 is a prime.

It is a super-2 number, since 2×64877694783² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64877694083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10412313 + ... + 10418541.

It is an arithmetic number, because the mean of its divisors is an integer number (2959972680).

Almost surely, 2^64877694783 is an apocalyptic number.

64877694783 is a deficient number, since it is larger than the sum of its proper divisors (29841430977).

64877694783 is a wasteful number, since it uses less digits than its factorization.

64877694783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367.

The product of its digits is 341397504, while the sum is 69.

The spelling of 64877694783 in words is "sixty-four billion, eight hundred seventy-seven million, six hundred ninety-four thousand, seven hundred eighty-three".