15784153225 has 9 divisors (see below), whose sum is σ = 19573128967. Its totient is φ = 12626820040.

The previous prime is 15784153211. The next prime is 15784153277. The reversal of 15784153225 is 52235148751.

The square root of 15784153225 is 125635.

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., 5682295161 + 10101858064 = 75381^2 + 100508^2 .

It is not a de Polignac number, because 15784153225 - 2⁵ = 15784153193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 615612 + ... + 640738.

Almost surely, 2^15784153225 is an apocalyptic number.

15784153225 is the 125635-th square number.

15784153225 is the 62818-th centered octagonal number.

It is an amenable number.

15784153225 is a deficient number, since it is larger than the sum of its proper divisors (3788975742).

15784153225 is an frugal number, since it uses more digits than its factorization.

15784153225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50264 (or 25132 counting only the distinct ones).

The product of its digits is 336000, while the sum is 43.

The spelling of 15784153225 in words is "fifteen billion, seven hundred eighty-four million, one hundred fifty-three thousand, two hundred twenty-five".