64496478868 has 12 divisors (see below), whose sum is σ = 112877220960. Its totient is φ = 32245844312.

The previous prime is 64496478863. The next prime is 64496478869. The reversal of 64496478868 is 86887469446.

It is a happy number.

It is a super-2 number, since 2×64496478868² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64496478797 and 64496478806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64496478863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537496 + ... + 646447.

It is an arithmetic number, because the mean of its divisors is an integer number (9406435080).

Almost surely, 2^64496478868 is an apocalyptic number.

It is an amenable number.

64496478868 is a deficient number, since it is larger than the sum of its proper divisors (48380742092).

64496478868 is a wasteful number, since it uses less digits than its factorization.

64496478868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197566 (or 1197564 counting only the distinct ones).

The product of its digits is 445906944, while the sum is 70.

The spelling of 64496478868 in words is "sixty-four billion, four hundred ninety-six million, four hundred seventy-eight thousand, eight hundred sixty-eight".