25897435949 has 24 divisors (see below), whose sum is σ = 33327205056. Its totient is φ = 19895568000.

The previous prime is 25897435933. The next prime is 25897435969. The reversal of 25897435949 is 94953479852.

It is not a de Polignac number, because 25897435949 - 2⁴ = 25897435933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897435969) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 300092 + ... + 376629.

It is an arithmetic number, because the mean of its divisors is an integer number (1388633544).

Almost surely, 2^25897435949 is an apocalyptic number.

It is an amenable number.

25897435949 is a deficient number, since it is larger than the sum of its proper divisors (7429769107).

25897435949 is a wasteful number, since it uses less digits than its factorization.

25897435949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676817 (or 676810 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 65.

The spelling of 25897435949 in words is "twenty-five billion, eight hundred ninety-seven million, four hundred thirty-five thousand, nine hundred forty-nine".