25269679512 has 640 divisors, whose sum is σ = 96548474880. Its totient is φ = 5978188800.

The previous prime is 25269679469. The next prime is 25269679549. The reversal of 25269679512 is 21597696252.

25269679512 is a `hidden beast` number, since 2 + 5 + 2 + 69 + 67 + 9 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 815150937 + ... + 815150967.

It is an arithmetic number, because the mean of its divisors is an integer number (150856992).

Almost surely, 2^25269679512 is an apocalyptic number.

25269679512 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 25269679512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48274237440).

25269679512 is an abundant number, since it is smaller than the sum of its proper divisors (71278795368).

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

25269679512 is a wasteful number, since it uses less digits than its factorization.

25269679512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 71 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 25269679512 in words is "twenty-five billion, two hundred sixty-nine million, six hundred seventy-nine thousand, five hundred twelve".