15245972745 has 16 divisors (see below), whose sum is σ = 24509170752. Its totient is φ = 8092647360.

The previous prime is 15245972741. The next prime is 15245972773. The reversal of 15245972745 is 54727954251.

It is not a de Polignac number, because 15245972745 - 2² = 15245972741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15245972741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2405362 + ... + 2411691.

It is an arithmetic number, because the mean of its divisors is an integer number (1531823172).

Almost surely, 2^15245972745 is an apocalyptic number.

15245972745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15245972745 is a deficient number, since it is larger than the sum of its proper divisors (9263198007).

15245972745 is a wasteful number, since it uses less digits than its factorization.

15245972745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4817272.

The product of its digits is 3528000, while the sum is 51.

The spelling of 15245972745 in words is "fifteen billion, two hundred forty-five million, nine hundred seventy-two thousand, seven hundred forty-five".