15326440000 has 105 divisors (see below), whose sum is σ = 38066086047. Its totient is φ = 6120672000.

The previous prime is 15326439923. The next prime is 15326440001. The reversal of 15326440000 is 4462351.

The square root of 15326440000 is 123800.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1201592896 + 14124847104 = 34664^2 + 118848^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15326440001) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 24759691 + ... + 24760309.

Almost surely, 2^15326440000 is an apocalyptic number.

15326440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15326440000 is the 123800-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15326440000

15326440000 is an abundant number, since it is smaller than the sum of its proper divisors (22739646047).

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

15326440000 is an frugal number, since it uses more digits than its factorization.

15326440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Multiplying 15326440000 by its sum of digits (25), we get a square (383161000000 = 619000²).

15326440000 divided by its sum of digits (25) gives a square (613057600 = 24760²).

The spelling of 15326440000 in words is "fifteen billion, three hundred twenty-six million, four hundred forty thousand".