25797975336 has 128 divisors (see below), whose sum is σ = 83121024000. Its totient is φ = 7260808896.

The previous prime is 25797975331. The next prime is 25797975341. The reversal of 25797975336 is 63357979752.

25797975336 is a `hidden beast` number, since 2 + 5 + 7 + 9 + 7 + 97 + 533 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (25797975331) and next prime (25797975341).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (25797975331) 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, 26026 + ... + 228633.

It is an arithmetic number, because the mean of its divisors is an integer number (649383000).

Almost surely, 2^25797975336 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 25797975336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41560512000).

25797975336 is an abundant number, since it is smaller than the sum of its proper divisors (57323048664).

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

25797975336 is a wasteful number, since it uses less digits than its factorization.

25797975336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254748 (or 254738 counting only the distinct ones).

The product of its digits is 75014100, while the sum is 63.

The spelling of 25797975336 in words is "twenty-five billion, seven hundred ninety-seven million, nine hundred seventy-five thousand, three hundred thirty-six".