25440055155 has 28 divisors (see below), whose sum is σ = 45771167520. Its totient is φ = 13568027472.

The previous prime is 25440055153. The next prime is 25440055163. The reversal of 25440055155 is 55155004452.

25440055155 is a `hidden beast` number, since 2 + 54 + 4 + 0 + 0 + 551 + 55 = 666.

It is not a de Polignac number, because 25440055155 - 2¹ = 25440055153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25440055153) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3486075 + ... + 3493364.

Almost surely, 2^25440055155 is an apocalyptic number.

25440055155 is a deficient number, since it is larger than the sum of its proper divisors (20331112365).

25440055155 is an frugal number, since it uses more digits than its factorization.

25440055155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6979462 (or 6979447 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 25440055155 in words is "twenty-five billion, four hundred forty million, fifty-five thousand, one hundred fifty-five".