25810947941964 has 12 divisors (see below), whose sum is σ = 60225545197944. Its totient is φ = 8603649313984.

The previous prime is 25810947941963. The next prime is 25810947941981. The reversal of 25810947941964 is 46914974901852.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×25810947941964² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25810947941963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075456164237 + ... + 1075456164260.

It is an arithmetic number, because the mean of its divisors is an integer number (5018795433162).

Almost surely, 2^{25810947941964} is an apocalyptic number.

It is an amenable number.

25810947941964 is an abundant number, since it is smaller than the sum of its proper divisors (34414597255980).

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

25810947941964 is a wasteful number, since it uses less digits than its factorization.

25810947941964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150912328504 (or 2150912328502 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 25810947941964 in words is "twenty-five trillion, eight hundred ten billion, nine hundred forty-seven million, nine hundred forty-one thousand, nine hundred sixty-four".