16265798597 has 4 divisors (see below), whose sum is σ = 17121893280. Its totient is φ = 15409703916.

The previous prime is 16265798579. The next prime is 16265798599. The reversal of 16265798597 is 79589756261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79589756261 = 13963 ⋅5700047.

It is a cyclic number.

It is not a de Polignac number, because 16265798597 - 2²⁶ = 16198689733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16265798599) 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, 428047313 + ... + 428047350.

It is an arithmetic number, because the mean of its divisors is an integer number (4280473320).

Almost surely, 2^16265798597 is an apocalyptic number.

It is an amenable number.

16265798597 is a deficient number, since it is larger than the sum of its proper divisors (856094683).

16265798597 is an equidigital number, since it uses as much as digits as its factorization.

16265798597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856094682.

The product of its digits is 57153600, while the sum is 65.

The spelling of 16265798597 in words is "sixteen billion, two hundred sixty-five million, seven hundred ninety-eight thousand, five hundred ninety-seven".