25404638631955 has 16 divisors (see below), whose sum is σ = 33258841636608. Its totient is φ = 18475067404000.

The previous prime is 25404638631949. The next prime is 25404638632001. The reversal of 25404638631955 is 55913683640452.

It is not a de Polignac number, because 25404638631955 - 2⁹ = 25404638631443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25404638631893 and 25404638631902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11924791 + ... + 13892800.

It is an arithmetic number, because the mean of its divisors is an integer number (2078677602288).

Almost surely, 2^{25404638631955} is an apocalyptic number.

25404638631955 is a deficient number, since it is larger than the sum of its proper divisors (7854203004653).

25404638631955 is a wasteful number, since it uses less digits than its factorization.

25404638631955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25835498.

The product of its (nonzero) digits is 93312000, while the sum is 61.

The spelling of 25404638631955 in words is "twenty-five trillion, four hundred four billion, six hundred thirty-eight million, six hundred thirty-one thousand, nine hundred fifty-five".