64419988695 has 16 divisors (see below), whose sum is σ = 103647807360. Its totient is φ = 34165385504.

The previous prime is 64419988693. The next prime is 64419988697. The reversal of 64419988695 is 59688991446.

It is an interprime number because it is at equal distance from previous prime (64419988693) and next prime (64419988697).

It is a cyclic number.

It is not a de Polignac number, because 64419988695 - 2¹ = 64419988693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64419988691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11993589 + ... + 11998958.

It is an arithmetic number, because the mean of its divisors is an integer number (6477987960).

Almost surely, 2^64419988695 is an apocalyptic number.

64419988695 is a deficient number, since it is larger than the sum of its proper divisors (39227818665).

64419988695 is a wasteful number, since it uses less digits than its factorization.

64419988695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23992734.

The product of its digits is 134369280, while the sum is 69.

The spelling of 64419988695 in words is "sixty-four billion, four hundred nineteen million, nine hundred eighty-eight thousand, six hundred ninety-five".