25544045331 has 16 divisors (see below), whose sum is σ = 43249177600. Its totient is φ = 14596597224.

The previous prime is 25544045327. The next prime is 25544045333. The reversal of 25544045331 is 13354044552.

It is not a de Polignac number, because 25544045331 - 2² = 25544045327 is a prime.

It is a super-2 number, since 2×25544045331² (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 (25544045333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67576651 + ... + 67577028.

It is an arithmetic number, because the mean of its divisors is an integer number (2703073600).

Almost surely, 2^25544045331 is an apocalyptic number.

25544045331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25544045331 is a deficient number, since it is larger than the sum of its proper divisors (17705132269).

25544045331 is a wasteful number, since it uses less digits than its factorization.

25544045331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135153695 (or 135153689 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 25544045331 its reverse (13354044552), we get a palindrome (38898089883).

The spelling of 25544045331 in words is "twenty-five billion, five hundred forty-four million, forty-five thousand, three hundred thirty-one".