25397535745 has 32 divisors (see below), whose sum is σ = 32000228640. Its totient is φ = 19330928640.

The previous prime is 25397535721. The next prime is 25397535763. The reversal of 25397535745 is 54753579352.

It can be written as a sum of positive squares in 16 ways, for example, as 4992270336 + 20405265409 = 70656^2 + 142847^2 .

It is not a de Polignac number, because 25397535745 - 2¹⁷ = 25397404673 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1945801 + ... + 1958809.

It is an arithmetic number, because the mean of its divisors is an integer number (1000007145).

Almost surely, 2^25397535745 is an apocalyptic number.

It is an amenable number.

25397535745 is a deficient number, since it is larger than the sum of its proper divisors (6602692895).

25397535745 is a wasteful number, since it uses less digits than its factorization.

25397535745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13285.

The product of its digits is 19845000, while the sum is 55.

The spelling of 25397535745 in words is "twenty-five billion, three hundred ninety-seven million, five hundred thirty-five thousand, seven hundred forty-five".