15664513453 has 2 divisors, whose sum is σ = 15664513454. Its totient is φ = 15664513452.

The previous prime is 15664513427. The next prime is 15664513477. The reversal of 15664513453 is 35431546651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15297484489 + 367028964 = 123683^2 + 19158^2 .

It is a cyclic number.

It is not a de Polignac number, because 15664513453 - 2¹⁷ = 15664382381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15664513853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7832256726 + 7832256727.

It is an arithmetic number, because the mean of its divisors is an integer number (7832256727).

Almost surely, 2^15664513453 is an apocalyptic number.

It is an amenable number.

15664513453 is a deficient number, since it is larger than the sum of its proper divisors (1).

15664513453 is an equidigital number, since it uses as much as digits as its factorization.

15664513453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 43.

The spelling of 15664513453 in words is "fifteen billion, six hundred sixty-four million, five hundred thirteen thousand, four hundred fifty-three".