15122112784 has 45 divisors (see below), whose sum is σ = 29786359269. Its totient is φ = 7437346560.

The previous prime is 15122112781. The next prime is 15122112793. The reversal of 15122112784 is 48721122151.

The square root of 15122112784 is 122972.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1695792400 + 13426320384 = 41180^2 + 115872^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15122112781) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 34923832 + ... + 34924264.

Almost surely, 2^15122112784 is an apocalyptic number.

15122112784 is the 122972-nd square number.

It is an amenable number.

15122112784 is a deficient number, since it is larger than the sum of its proper divisors (14664246485).

15122112784 is an frugal number, since it uses more digits than its factorization.

15122112784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 506 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The spelling of 15122112784 in words is "fifteen billion, one hundred twenty-two million, one hundred twelve thousand, seven hundred eighty-four".