25985489012 has 24 divisors (see below), whose sum is σ = 52125213504. Its totient is φ = 11103587712.

The previous prime is 25985488999. The next prime is 25985489017. The reversal of 25985489012 is 21098458952.

It is a happy number.

It is a super-2 number, since 2×25985489012² (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 (25985489017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367498 + ... + 1386369.

It is an arithmetic number, because the mean of its divisors is an integer number (2171883896).

Almost surely, 2^25985489012 is an apocalyptic number.

It is an amenable number.

25985489012 is an abundant number, since it is smaller than the sum of its proper divisors (26139724492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25985489012 is a wasteful number, since it uses less digits than its factorization.

25985489012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754215 (or 2754213 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 25985489012 in words is "twenty-five billion, nine hundred eighty-five million, four hundred eighty-nine thousand, twelve".