25381654621 has 8 divisors (see below), whose sum is σ = 26721406400. Its totient is φ = 24042290400.

The previous prime is 25381654607. The next prime is 25381654631. The reversal of 25381654621 is 12645618352.

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

It is a cyclic number.

It is not a de Polignac number, because 25381654621 - 2⁵ = 25381654589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25381654631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42721 + ... + 229321.

It is an arithmetic number, because the mean of its divisors is an integer number (3340175800).

Almost surely, 2^25381654621 is an apocalyptic number.

It is an amenable number.

25381654621 is a deficient number, since it is larger than the sum of its proper divisors (1339751779).

25381654621 is a wasteful number, since it uses less digits than its factorization.

25381654621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193779.

The product of its digits is 345600, while the sum is 43.

The spelling of 25381654621 in words is "twenty-five billion, three hundred eighty-one million, six hundred fifty-four thousand, six hundred twenty-one".