15420456593 has 2 divisors, whose sum is σ = 15420456594. Its totient is φ = 15420456592.

The previous prime is 15420456529. The next prime is 15420456599. The reversal of 15420456593 is 39565402451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13907013184 + 1513443409 = 117928^2 + 38903^2 .

It is a cyclic number.

It is not a de Polignac number, because 15420456593 - 2⁶ = 15420456529 is a prime.

It is not a weakly prime, because it can be changed into another prime (15420456599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710228296 + 7710228297.

It is an arithmetic number, because the mean of its divisors is an integer number (7710228297).

Almost surely, 2^15420456593 is an apocalyptic number.

It is an amenable number.

15420456593 is a deficient number, since it is larger than the sum of its proper divisors (1).

15420456593 is an equidigital number, since it uses as much as digits as its factorization.

15420456593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 15420456593 in words is "fifteen billion, four hundred twenty million, four hundred fifty-six thousand, five hundred ninety-three".