15315890909 has 8 divisors (see below), whose sum is σ = 16713930528. Its totient is φ = 13918798960.

The previous prime is 15315890897. The next prime is 15315890911. The reversal of 15315890909 is 90909851351.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15315890909 - 2¹² = 15315886813 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 (15315890209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202907 + ... + 267960.

It is an arithmetic number, because the mean of its divisors is an integer number (2089241316).

Almost surely, 2^15315890909 is an apocalyptic number.

It is an amenable number.

15315890909 is a deficient number, since it is larger than the sum of its proper divisors (1398039619).

15315890909 is a wasteful number, since it uses less digits than its factorization.

15315890909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473835.

The product of its (nonzero) digits is 437400, while the sum is 50.

The spelling of 15315890909 in words is "fifteen billion, three hundred fifteen million, eight hundred ninety thousand, nine hundred nine".