25021044426816 has 567 divisors, whose sum is σ = 76043504994093. Its totient is φ = 7865708497920.

The previous prime is 25021044426751. The next prime is 25021044426857. The reversal of 25021044426816 is 61862444012052.

The square root of 25021044426816 is 5002104.

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

25021044426816 is a `hidden beast` number, since 2 + 5 + 0 + 210 + 4 + 4 + 426 + 8 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22389174158400 + 2631870268416 = 4731720^2 + 1622304^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 191000339071 + ... + 191000339201.

Almost surely, 2^{25021044426816} is an apocalyptic number.

25021044426816 is the 5002104-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25021044426816

25021044426816 is an abundant number, since it is smaller than the sum of its proper divisors (51022460567277).

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

25021044426816 is an equidigital number, since it uses as much as digits as its factorization.

25021044426816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

Adding to 25021044426816 its reverse (61862444012052), we get a palindrome (86883488438868).

The spelling of 25021044426816 in words is "twenty-five trillion, twenty-one billion, forty-four million, four hundred twenty-six thousand, eight hundred sixteen".