25157545865 has 8 divisors (see below), whose sum is σ = 30225831048. Its totient is φ = 20101519360.

The previous prime is 25157545793. The next prime is 25157545867. The reversal of 25157545865 is 56854575152.

It can be written as a sum of positive squares in 4 ways, for example, as 872375296 + 24285170569 = 29536^2 + 155837^2 .

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

It is not a de Polignac number, because 25157545865 - 2¹⁶ = 25157480329 is a prime.

It is a super-2 number, since 2×25157545865² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25157545867) 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, 3060152 + ... + 3068361.

It is an arithmetic number, because the mean of its divisors is an integer number (3778228881).

Almost surely, 2^25157545865 is an apocalyptic number.

It is an amenable number.

25157545865 is a deficient number, since it is larger than the sum of its proper divisors (5068285183).

25157545865 is an equidigital number, since it uses as much as digits as its factorization.

25157545865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129339.

The product of its digits is 8400000, while the sum is 53.

The spelling of 25157545865 in words is "twenty-five billion, one hundred fifty-seven million, five hundred forty-five thousand, eight hundred sixty-five".