25405132100555 has 4 divisors (see below), whose sum is σ = 30486158520672. Its totient is φ = 20324105680440.

The previous prime is 25405132100549. The next prime is 25405132100573. The reversal of 25405132100555 is 55500123150452.

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

It is not a de Polignac number, because 25405132100555 - 2²⁴ = 25405115323339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540513210051 + ... + 2540513210060.

It is an arithmetic number, because the mean of its divisors is an integer number (7621539630168).

Almost surely, 2^{25405132100555} is an apocalyptic number.

25405132100555 is a deficient number, since it is larger than the sum of its proper divisors (5081026420117).

25405132100555 is an equidigital number, since it uses as much as digits as its factorization.

25405132100555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081026420116.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 25405132100555 in words is "twenty-five trillion, four hundred five billion, one hundred thirty-two million, one hundred thousand, five hundred fifty-five".