23278716464 has 20 divisors (see below), whose sum is σ = 45115468080. Its totient is φ = 11636015040.

The previous prime is 23278716451. The next prime is 23278716481. The reversal of 23278716464 is 46461787232.

It is a super-2 number, since 2×23278716464² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151019 + ... + 263370.

It is an arithmetic number, because the mean of its divisors is an integer number (2255773404).

Almost surely, 2^23278716464 is an apocalyptic number.

It is an amenable number.

23278716464 is a deficient number, since it is larger than the sum of its proper divisors (21836751616).

23278716464 is a wasteful number, since it uses less digits than its factorization.

23278716464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417908 (or 417902 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 50.

The spelling of 23278716464 in words is "twenty-three billion, two hundred seventy-eight million, seven hundred sixteen thousand, four hundred sixty-four".