8640138458 has 16 divisors (see below), whose sum is σ = 14814316800. Its totient is φ = 3702253776.

The previous prime is 8640138443. The next prime is 8640138467. The reversal of 8640138458 is 8548310468.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30368 + ... + 134916.

It is an arithmetic number, because the mean of its divisors is an integer number (925894800).

Almost surely, 2^8640138458 is an apocalyptic number.

8640138458 is a deficient number, since it is larger than the sum of its proper divisors (6174178342).

8640138458 is a wasteful number, since it uses less digits than its factorization.

8640138458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110461.

The product of its (nonzero) digits is 737280, while the sum is 47.

The square root of 8640138458 is about 92952.3450914500. The cubic root of 8640138458 is about 2051.9820970576.

The spelling of 8640138458 in words is "eight billion, six hundred forty million, one hundred thirty-eight thousand, four hundred fifty-eight".