15315868545 has 8 divisors (see below), whose sum is σ = 24505389696. Its totient is φ = 8168463216.

The previous prime is 15315868493. The next prime is 15315868573. The reversal of 15315868545 is 54586851351.

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 15315868545 - 2⁶ = 15315868481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510528937 + ... + 510528966.

It is an arithmetic number, because the mean of its divisors is an integer number (3063173712).

Almost surely, 2^15315868545 is an apocalyptic number.

15315868545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15315868545 is a deficient number, since it is larger than the sum of its proper divisors (9189521151).

15315868545 is a wasteful number, since it uses less digits than its factorization.

15315868545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021057911.

The product of its digits is 2880000, while the sum is 51.

The spelling of 15315868545 in words is "fifteen billion, three hundred fifteen million, eight hundred sixty-eight thousand, five hundred forty-five".