25262857349 has 4 divisors (see below), whose sum is σ = 26592481440. Its totient is φ = 23933233260.

The previous prime is 25262857343. The next prime is 25262857351. The reversal of 25262857349 is 94375826252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25262857349 - 2²⁰ = 25261808773 is a prime.

It is a super-2 number, since 2×25262857349² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25262857349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25262857343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664812017 + ... + 664812054.

It is an arithmetic number, because the mean of its divisors is an integer number (6648120360).

Almost surely, 2^25262857349 is an apocalyptic number.

It is an amenable number.

25262857349 is a deficient number, since it is larger than the sum of its proper divisors (1329624091).

25262857349 is a wasteful number, since it uses less digits than its factorization.

25262857349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329624090.

The product of its digits is 7257600, while the sum is 53.

The spelling of 25262857349 in words is "twenty-five billion, two hundred sixty-two million, eight hundred fifty-seven thousand, three hundred forty-nine".