25951220046756 has 135 divisors (see below), whose sum is σ = 69733844867379. Its totient is φ = 8415511552512.

The previous prime is 25951220046737. The next prime is 25951220046757. The reversal of 25951220046756 is 65764002215952.

The square root of 25951220046756 is 5094234.

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

25951220046756 is a `hidden beast` number, since 2 + 5 + 9 + 5 + 122 + 0 + 0 + 467 + 56 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 370041056100 + 25581178990656 = 608310^2 + 5057784^2 .

It is a super-2 number, since 2×25951220046756² (a number of 28 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (25951220046757) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 3392756020 + ... + 3392763668.

Almost surely, 2^{25951220046756} is an apocalyptic number.

25951220046756 is the 5094234-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25951220046756

25951220046756 is an abundant number, since it is smaller than the sum of its proper divisors (43782624820623).

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

25951220046756 is an frugal number, since it uses more digits than its factorization.

25951220046756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15388 (or 7691 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 25951220046756 in words is "twenty-five trillion, nine hundred fifty-one billion, two hundred twenty million, forty-six thousand, seven hundred fifty-six".