9815999730265 has 24 divisors (see below), whose sum is σ = 12091735940544. Its totient is φ = 7649072942400.

The previous prime is 9815999730239. The next prime is 9815999730323. The reversal of 9815999730265 is 5620379995189.

It is not a de Polignac number, because 9815999730265 - 2⁴³ = 1019906708057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644851 + ... + 4477480.

It is an arithmetic number, because the mean of its divisors is an integer number (503822330856).

Almost surely, 2^{9815999730265} is an apocalyptic number.

It is an amenable number.

9815999730265 is a deficient number, since it is larger than the sum of its proper divisors (2275736210279).

9815999730265 is a wasteful number, since it uses less digits than its factorization.

9815999730265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122561 (or 5122500 counting only the distinct ones).

The product of its (nonzero) digits is 330674400, while the sum is 73.

The spelling of 9815999730265 in words is "nine trillion, eight hundred fifteen billion, nine hundred ninety-nine million, seven hundred thirty thousand, two hundred sixty-five".