25502775523 has 2 divisors, whose sum is σ = 25502775524. Its totient is φ = 25502775522.

The previous prime is 25502775509. The next prime is 25502775553. The reversal of 25502775523 is 32557720552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25502775523 - 2²⁵ = 25469221091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25502775523.

It is not a weakly prime, because it can be changed into another prime (25502775553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751387761 + 12751387762.

It is an arithmetic number, because the mean of its divisors is an integer number (12751387762).

Almost surely, 2^25502775523 is an apocalyptic number.

25502775523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25502775523 is an equidigital number, since it uses as much as digits as its factorization.

25502775523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 735000, while the sum is 43.

It can be divided in two parts, 25502 and 775523, that added together give a square (801025 = 895²).

The spelling of 25502775523 in words is "twenty-five billion, five hundred two million, seven hundred seventy-five thousand, five hundred twenty-three".