25208727381 has 24 divisors (see below), whose sum is σ = 37195835040. Its totient is φ = 16448114976.

The previous prime is 25208727367. The next prime is 25208727403. The reversal of 25208727381 is 18372780252.

It is not a de Polignac number, because 25208727381 - 2⁶ = 25208727317 is a prime.

It is a super-2 number, since 2×25208727381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25208727581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77766 + ... + 237623.

It is an arithmetic number, because the mean of its divisors is an integer number (1549826460).

Almost surely, 2^25208727381 is an apocalyptic number.

It is an amenable number.

25208727381 is a deficient number, since it is larger than the sum of its proper divisors (11987107659).

25208727381 is a wasteful number, since it uses less digits than its factorization.

25208727381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315585 (or 315582 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 25208727381 in words is "twenty-five billion, two hundred eight million, seven hundred twenty-seven thousand, three hundred eighty-one".