18494278268464 has 10 divisors (see below), whose sum is σ = 35832664145180. Its totient is φ = 9247139134224.

The previous prime is 18494278268437. The next prime is 18494278268491. The reversal of 18494278268464 is 46486287249481.

It is an interprime number because it is at equal distance from previous prime (18494278268437) and next prime (18494278268491).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577946195874 + ... + 577946195905.

It is an arithmetic number, because the mean of its divisors is an integer number (3583266414518).

Almost surely, 2^{18494278268464} is an apocalyptic number.

It is an amenable number.

18494278268464 is a deficient number, since it is larger than the sum of its proper divisors (17338385876716).

18494278268464 is a wasteful number, since it uses less digits than its factorization.

18494278268464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155892391787 (or 1155892391781 counting only the distinct ones).

The product of its digits is 1189085184, while the sum is 73.

The spelling of 18494278268464 in words is "eighteen trillion, four hundred ninety-four billion, two hundred seventy-eight million, two hundred sixty-eight thousand, four hundred sixty-four".