25306606512 has 120 divisors (see below), whose sum is σ = 77308624848. Its totient is φ = 7664025600.

The previous prime is 25306606499. The next prime is 25306606513. The reversal of 25306606512 is 21560660352.

It is a happy number.

25306606512 is a `hidden beast` number, since 2 + 5 + 30 + 6 + 606 + 5 + 12 = 666.

It is a super-2 number, since 2×25306606512² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25306606513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3343212 + ... + 3350772.

Almost surely, 2^25306606512 is an apocalyptic number.

25306606512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25306606512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38654312424).

25306606512 is an abundant number, since it is smaller than the sum of its proper divisors (52002018336).

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

25306606512 is a wasteful number, since it uses less digits than its factorization.

25306606512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9699 (or 9690 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 25306606512 in words is "twenty-five billion, three hundred six million, six hundred six thousand, five hundred twelve".