25275833856 has 720 divisors, whose sum is σ = 93390897600. Its totient is φ = 6521389056.

The previous prime is 25275833813. The next prime is 25275833897. The reversal of 25275833856 is 65833857252.

25275833856 is a `hidden beast` number, since 2 + 5 + 2 + 7 + 583 + 3 + 8 + 56 = 666.

It is a super-2 number, since 2×25275833856² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 231888330 + ... + 231888438.

It is an arithmetic number, because the mean of its divisors is an integer number (129709580).

Almost surely, 2^25275833856 is an apocalyptic number.

25275833856 is a gapful number since it is divisible by the number (26) 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 25275833856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46695448800).

25275833856 is an abundant number, since it is smaller than the sum of its proper divisors (68115063744).

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

25275833856 is a wasteful number, since it uses less digits than its factorization.

25275833856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 213 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 25275833856 in words is "twenty-five billion, two hundred seventy-five million, eight hundred thirty-three thousand, eight hundred fifty-six".