18449965457 has 16 divisors (see below), whose sum is σ = 23005900800. Its totient is φ = 14374505040.

The previous prime is 18449965451. The next prime is 18449965481. The reversal of 18449965457 is 75456994481.

It is not a de Polignac number, because 18449965457 - 2⁴ = 18449965441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18449965457.

It is not an unprimeable number, because it can be changed into a prime (18449965451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712544 + ... + 737982.

It is an arithmetic number, because the mean of its divisors is an integer number (1437868800).

Almost surely, 2^18449965457 is an apocalyptic number.

It is an amenable number.

18449965457 is a deficient number, since it is larger than the sum of its proper divisors (4555935343).

18449965457 is a wasteful number, since it uses less digits than its factorization.

18449965457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34876.

The product of its digits is 43545600, while the sum is 62.

The spelling of 18449965457 in words is "eighteen billion, four hundred forty-nine million, nine hundred sixty-five thousand, four hundred fifty-seven".