25251312112 has 120 divisors (see below), whose sum is σ = 53903938320. Its totient is φ = 11452446720.

The previous prime is 25251312109. The next prime is 25251312143. The reversal of 25251312112 is 21121315252.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76287787 + ... + 76288117.

It is an arithmetic number, because the mean of its divisors is an integer number (449199486).

Almost surely, 2^25251312112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25251312112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26951969160).

25251312112 is an abundant number, since it is smaller than the sum of its proper divisors (28652626208).

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

25251312112 is a wasteful number, since it uses less digits than its factorization.

25251312112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 752 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

Adding to 25251312112 its reverse (21121315252), we get a palindrome (46372627364).

The spelling of 25251312112 in words is "twenty-five billion, two hundred fifty-one million, three hundred twelve thousand, one hundred twelve".