25253155397 has 4 divisors (see below), whose sum is σ = 25681175040.
Its totient is φ = 24825135756.
The previous prime is 25253155373. The next prime is 25253155439. The reversal of 25253155397 is 79355135252.
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 25253155397 - 228 = 24984719941 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 (25453155397) 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, 214009733 + ... + 214009850.
It is an arithmetic number, because the mean of its divisors is an integer number (6420293760).
Almost surely, 225253155397 is an apocalyptic number.
It is an amenable number.
25253155397 is a deficient number, since it is larger than the sum of its proper divisors (428019643).
25253155397 is an equidigital number, since it uses as much as digits as its factorization.
25253155397 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 428019642.
The product of its digits is 1417500, while the sum is 47.
The spelling of 25253155397 in words is "twenty-five billion, two hundred fifty-three million, one hundred fifty-five thousand, three hundred ninety-seven".