25455997693 has 36 divisors (see below), whose sum is σ = 31598994240. Its totient is φ = 20442882432.

The previous prime is 25455997687. The next prime is 25455997739. The reversal of 25455997693 is 39679955452.

It is not a de Polignac number, because 25455997693 - 2¹³ = 25455989501 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 (25455997393) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 3210588 + ... + 3218506.

It is an arithmetic number, because the mean of its divisors is an integer number (877749840).

Almost surely, 2^25455997693 is an apocalyptic number.

It is an amenable number.

25455997693 is a deficient number, since it is larger than the sum of its proper divisors (6142996547).

25455997693 is a wasteful number, since it uses less digits than its factorization.

25455997693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194 (or 8170 counting only the distinct ones).

The product of its digits is 91854000, while the sum is 64.

The spelling of 25455997693 in words is "twenty-five billion, four hundred fifty-five million, nine hundred ninety-seven thousand, six hundred ninety-three".