15817134945 has 16 divisors (see below), whose sum is σ = 25329978432. Its totient is φ = 8428284480.

The previous prime is 15817134901. The next prime is 15817134973. The reversal of 15817134945 is 54943171851.

It is not a de Polignac number, because 15817134945 - 2¹³ = 15817126753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15817134894 and 15817134903.

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, 452646 + ... + 486335.

It is an arithmetic number, because the mean of its divisors is an integer number (1583123652).

Almost surely, 2^15817134945 is an apocalyptic number.

15817134945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15817134945 is a deficient number, since it is larger than the sum of its proper divisors (9512843487).

15817134945 is a wasteful number, since it uses less digits than its factorization.

15817134945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940112.

The product of its digits is 604800, while the sum is 48.

The spelling of 15817134945 in words is "fifteen billion, eight hundred seventeen million, one hundred thirty-four thousand, nine hundred forty-five".