25295727697 has 8 divisors (see below), whose sum is σ = 25444777640. Its totient is φ = 25147013760.

The previous prime is 25295727689. The next prime is 25295727701. The reversal of 25295727697 is 79672759252.

It can be written as a sum of positive squares in 4 ways, for example, as 11119491601 + 14176236096 = 105449^2 + 119064^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25295727697 - 2³ = 25295727689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25295727607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67813 + ... + 234925.

It is an arithmetic number, because the mean of its divisors is an integer number (3180597205).

Almost surely, 2^25295727697 is an apocalyptic number.

It is an amenable number.

25295727697 is a deficient number, since it is larger than the sum of its proper divisors (149049943).

25295727697 is a wasteful number, since it uses less digits than its factorization.

25295727697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168003.

The product of its digits is 33339600, while the sum is 61.

The spelling of 25295727697 in words is "twenty-five billion, two hundred ninety-five million, seven hundred twenty-seven thousand, six hundred ninety-seven".