25502672155 has 4 divisors (see below), whose sum is σ = 30603206592. Its totient is φ = 20402137720.

The previous prime is 25502672141. The next prime is 25502672161. The reversal of 25502672155 is 55127620552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25502672155 - 2¹⁵ = 25502639387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550267211 + ... + 2550267220.

It is an arithmetic number, because the mean of its divisors is an integer number (7650801648).

Almost surely, 2^25502672155 is an apocalyptic number.

25502672155 is a deficient number, since it is larger than the sum of its proper divisors (5100534437).

25502672155 is an equidigital number, since it uses as much as digits as its factorization.

25502672155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100534436.

The product of its (nonzero) digits is 210000, while the sum is 40.

The spelling of 25502672155 in words is "twenty-five billion, five hundred two million, six hundred seventy-two thousand, one hundred fifty-five".