25645961802 has 16 divisors (see below), whose sum is σ = 51771288672. Its totient is φ = 8468759760.

The previous prime is 25645961749. The next prime is 25645961827. The reversal of 25645961802 is 20816954652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19972849 + ... + 19974132.

It is an arithmetic number, because the mean of its divisors is an integer number (3235705542).

Almost surely, 2^25645961802 is an apocalyptic number.

25645961802 is an abundant number, since it is smaller than the sum of its proper divisors (26125326870).

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

25645961802 is a wasteful number, since it uses less digits than its factorization.

25645961802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39947093.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 25645961802 in words is "twenty-five billion, six hundred forty-five million, nine hundred sixty-one thousand, eight hundred two".