15917063397 has 4 divisors (see below), whose sum is σ = 21222751200. Its totient is φ = 10611375596.

The previous prime is 15917063353. The next prime is 15917063423. The reversal of 15917063397 is 79336071951.

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 15917063397 - 2¹⁹ = 15916539109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15917063347) 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, 2652843897 + ... + 2652843902.

It is an arithmetic number, because the mean of its divisors is an integer number (5305687800).

Almost surely, 2^15917063397 is an apocalyptic number.

It is an amenable number.

15917063397 is a deficient number, since it is larger than the sum of its proper divisors (5305687803).

15917063397 is an equidigital number, since it uses as much as digits as its factorization.

15917063397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305687802.

The product of its (nonzero) digits is 1071630, while the sum is 51.

The spelling of 15917063397 in words is "fifteen billion, nine hundred seventeen million, sixty-three thousand, three hundred ninety-seven".