25661145002 has 8 divisors (see below), whose sum is σ = 39386873856. Its totient is φ = 12532187052.

The previous prime is 25661144987. The next prime is 25661145053. The reversal of 25661145002 is 20054116652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25661145002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149192618 + ... + 149192789.

It is an arithmetic number, because the mean of its divisors is an integer number (4923359232).

Almost surely, 2^25661145002 is an apocalyptic number.

25661145002 is a deficient number, since it is larger than the sum of its proper divisors (13725728854).

25661145002 is a wasteful number, since it uses less digits than its factorization.

25661145002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298385452.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 25661145002 in words is "twenty-five billion, six hundred sixty-one million, one hundred forty-five thousand, two".