25964645780 has 24 divisors (see below), whose sum is σ = 54555355008. Its totient is φ = 10380220448.

The previous prime is 25964645741. The next prime is 25964645783. The reversal of 25964645780 is 8754646952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25964645783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314504 + ... + 388383.

It is an arithmetic number, because the mean of its divisors is an integer number (2273139792).

Almost surely, 2^25964645780 is an apocalyptic number.

25964645780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25964645780 is an abundant number, since it is smaller than the sum of its proper divisors (28590709228).

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

25964645780 is a wasteful number, since it uses less digits than its factorization.

25964645780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704743 (or 704741 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 25964645780 in words is "twenty-five billion, nine hundred sixty-four million, six hundred forty-five thousand, seven hundred eighty".