15501220265 has 16 divisors (see below), whose sum is σ = 18930722880. Its totient is φ = 12181993920.

The previous prime is 15501220249. The next prime is 15501220283. The reversal of 15501220265 is 56202210551.

It is not a de Polignac number, because 15501220265 - 2⁴ = 15501220249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207746 + ... + 272324.

It is an arithmetic number, because the mean of its divisors is an integer number (1183170180).

Almost surely, 2^15501220265 is an apocalyptic number.

It is an amenable number.

15501220265 is a deficient number, since it is larger than the sum of its proper divisors (3429502615).

15501220265 is an equidigital number, since it uses as much as digits as its factorization.

15501220265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65432.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 15501220265 in words is "fifteen billion, five hundred one million, two hundred twenty thousand, two hundred sixty-five".