15226572816 has 405 divisors, whose sum is σ = 54156176919. Its totient is φ = 3980261376.

The previous prime is 15226572793. The next prime is 15226572853. The reversal of 15226572816 is 61827562251.

The square root of 15226572816 is 123396.

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

15226572816 is a `hidden beast` number, since 1 + 52 + 26 + 572 + 8 + 1 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11362707216 + 3863865600 = 106596^2 + 62160^2 .

Its product of digits (403200) is a multiple of the sum of its prime factors (280).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 134748376 + ... + 134748488.

Almost surely, 2^15226572816 is an apocalyptic number.

15226572816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15226572816 is the 123396-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15226572816

15226572816 is an abundant number, since it is smaller than the sum of its proper divisors (38929604103).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15226572816 is a wasteful number, since it uses less digits than its factorization.

15226572816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 138 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The spelling of 15226572816 in words is "fifteen billion, two hundred twenty-six million, five hundred seventy-two thousand, eight hundred sixteen".