25421987795 has 8 divisors (see below), whose sum is σ = 30507670224. Its totient is φ = 20336733664.

The previous prime is 25421987771. The next prime is 25421987819. The reversal of 25421987795 is 59778912452.

It is an interprime number because it is at equal distance from previous prime (25421987771) and next prime (25421987819).

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 25421987795 - 2¹⁰ = 25421986771 is a prime.

It is a Duffinian number.

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, 42512 + ... + 229458.

It is an arithmetic number, because the mean of its divisors is an integer number (3813458778).

Almost surely, 2^25421987795 is an apocalyptic number.

25421987795 is a deficient number, since it is larger than the sum of its proper divisors (5085682429).

25421987795 is a wasteful number, since it uses less digits than its factorization.

25421987795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214149.

The product of its digits is 12700800, while the sum is 59.

The spelling of 25421987795 in words is "twenty-five billion, four hundred twenty-one million, nine hundred eighty-seven thousand, seven hundred ninety-five".