9868915657438 has 16 divisors (see below), whose sum is σ = 14840639467200. Its totient is φ = 4922036416000.

The previous prime is 9868915657421. The next prime is 9868915657457. The reversal of 9868915657438 is 8347565198689.

It is a congruent number.

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, 41263158 + ... + 41501638.

It is an arithmetic number, because the mean of its divisors is an integer number (927539966700).

Almost surely, 2^{9868915657438} is an apocalyptic number.

9868915657438 is a deficient number, since it is larger than the sum of its proper divisors (4971723809762).

9868915657438 is a wasteful number, since it uses less digits than its factorization.

9868915657438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290483.

The product of its digits is 3135283200, while the sum is 79.

The spelling of 9868915657438 in words is "nine trillion, eight hundred sixty-eight billion, nine hundred fifteen million, six hundred fifty-seven thousand, four hundred thirty-eight".