25138916655 has 16 divisors (see below), whose sum is σ = 41609242080. Its totient is φ = 12945097088.

The previous prime is 25138916641. The next prime is 25138916683. The reversal of 25138916655 is 55661983152.

It is a cyclic number.

It is not a de Polignac number, because 25138916655 - 2⁴ = 25138916639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25138916598 and 25138916607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28894872 + ... + 28895741.

It is an arithmetic number, because the mean of its divisors is an integer number (2600577630).

Almost surely, 2^25138916655 is an apocalyptic number.

25138916655 is a deficient number, since it is larger than the sum of its proper divisors (16470325425).

25138916655 is a wasteful number, since it uses less digits than its factorization.

25138916655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57790650.

The product of its digits is 1944000, while the sum is 51.

The spelling of 25138916655 in words is "twenty-five billion, one hundred thirty-eight million, nine hundred sixteen thousand, six hundred fifty-five".