18464167457 has 2 divisors, whose sum is σ = 18464167458. Its totient is φ = 18464167456.

The previous prime is 18464167417. The next prime is 18464167541. The reversal of 18464167457 is 75476146481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17817177361 + 646990096 = 133481^2 + 25436^2 .

It is a cyclic number.

It is not a de Polignac number, because 18464167457 - 2²² = 18459973153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18464167399 and 18464167408.

It is not a weakly prime, because it can be changed into another prime (18464167417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9232083728 + 9232083729.

It is an arithmetic number, because the mean of its divisors is an integer number (9232083729).

Almost surely, 2^18464167457 is an apocalyptic number.

It is an amenable number.

18464167457 is a deficient number, since it is larger than the sum of its proper divisors (1).

18464167457 is an equidigital number, since it uses as much as digits as its factorization.

18464167457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 53.

The spelling of 18464167457 in words is "eighteen billion, four hundred sixty-four million, one hundred sixty-seven thousand, four hundred fifty-seven".