25307719056 has 135 divisors (see below), whose sum is σ = 73696916683. Its totient is φ = 8418725280.

The previous prime is 25307719051. The next prime is 25307719079. The reversal of 25307719056 is 65091770352.

The square root of 25307719056 is 159084.

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

It is a super-2 number, since 2×25307719056² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25307719051) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 51542971 + ... + 51543461.

Almost surely, 2^25307719056 is an apocalyptic number.

25307719056 is the 159084-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25307719056

25307719056 is an abundant number, since it is smaller than the sum of its proper divisors (48389197627).

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

25307719056 is an frugal number, since it uses more digits than its factorization.

25307719056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 45.

The spelling of 25307719056 in words is "twenty-five billion, three hundred seven million, seven hundred nineteen thousand, fifty-six".