18461497449937 has 4 divisors (see below), whose sum is σ = 19433155210480. Its totient is φ = 17489839689396.

The previous prime is 18461497449911. The next prime is 18461497449959. The reversal of 18461497449937 is 73994479416481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18461497449937 - 2²⁷ = 18461363232209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18461497444937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485828880243 + ... + 485828880280.

It is an arithmetic number, because the mean of its divisors is an integer number (4858288802620).

Almost surely, 2^{18461497449937} is an apocalyptic number.

It is an amenable number.

18461497449937 is a deficient number, since it is larger than the sum of its proper divisors (971657760543).

18461497449937 is an equidigital number, since it uses as much as digits as its factorization.

18461497449937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971657760542.

The product of its digits is 1316818944, while the sum is 76.

The spelling of 18461497449937 in words is "eighteen trillion, four hundred sixty-one billion, four hundred ninety-seven million, four hundred forty-nine thousand, nine hundred thirty-seven".