25531565796 has 189 divisors, whose sum is σ = 73908070873. Its totient is φ = 7708076640.

The previous prime is 25531565791. The next prime is 25531565897. The reversal of 25531565796 is 69756513552.

The square root of 25531565796 is 159786.

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

25531565796 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 1 + 565 + 79 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1679852196 + 23851713600 = 40986^2 + 154440^2 .

It is a super-2 number, since 2×25531565796² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25531565791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 94912750 + ... + 94913018.

Almost surely, 2^25531565796 is an apocalyptic number.

25531565796 is the 159786-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25531565796

25531565796 is an abundant number, since it is smaller than the sum of its proper divisors (48376505077).

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

25531565796 is an equidigital number, since it uses as much as digits as its factorization.

25531565796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 285 counting only the distinct ones).

The product of its digits is 8505000, while the sum is 54.

The spelling of 25531565796 in words is "twenty-five billion, five hundred thirty-one million, five hundred sixty-five thousand, seven hundred ninety-six".