25611012 has 96 divisors (see below), whose sum is σ = 79923200. Its totient is φ = 6928416.

The previous prime is 25610971. The next prime is 25611013. The reversal of 25611012 is 21011652.

25611012 is a `hidden beast` number, since 2 + 561 + 101 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25611013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13473 + ... + 15255.

Almost surely, 2^25611012 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 25611012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39961600).

25611012 is an abundant number, since it is smaller than the sum of its proper divisors (54312188).

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

25611012 is a wasteful number, since it uses less digits than its factorization.

25611012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1814 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 25611012 is about 5060.7323580683. The cubic root of 25611012 is about 294.7647727447.

Adding to 25611012 its reverse (21011652), we get a palindrome (46622664).

The spelling of 25611012 in words is "twenty-five million, six hundred eleven thousand, twelve".