25227685397 has 4 divisors (see below), whose sum is σ = 25309860576. Its totient is φ = 25145510220.

The previous prime is 25227685369. The next prime is 25227685409. The reversal of 25227685397 is 79358672252.

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 25227685397 - 2¹⁴ = 25227669013 is a prime.

It is a super-2 number, since 2×25227685397² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25227685367) 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, 41087129 + ... + 41087742.

It is an arithmetic number, because the mean of its divisors is an integer number (6327465144).

Almost surely, 2^25227685397 is an apocalyptic number.

It is an amenable number.

25227685397 is a deficient number, since it is larger than the sum of its proper divisors (82175179).

25227685397 is an equidigital number, since it uses as much as digits as its factorization.

25227685397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82175178.

The product of its digits is 12700800, while the sum is 56.

The spelling of 25227685397 in words is "twenty-five billion, two hundred twenty-seven million, six hundred eighty-five thousand, three hundred ninety-seven".