25278756595428 has 192 divisors, whose sum is σ = 71726312706048. Its totient is φ = 6764294676480.

The previous prime is 25278756595387. The next prime is 25278756595459. The reversal of 25278756595428 is 82459565787252.

It is a self number, because there is not a number n which added to its sum of digits gives 25278756595428.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 263308051 + ... + 263404037.

It is an arithmetic number, because the mean of its divisors is an integer number (373574545344).

Almost surely, 2^{25278756595428} is an apocalyptic number.

25278756595428 is a gapful number since it is divisible by the number (28) 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 25278756595428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35863156353024).

25278756595428 is an abundant number, since it is smaller than the sum of its proper divisors (46447556110620).

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

25278756595428 is a wasteful number, since it uses less digits than its factorization.

25278756595428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96922 (or 96920 counting only the distinct ones).

The product of its digits is 3386880000, while the sum is 75.

The spelling of 25278756595428 in words is "twenty-five trillion, two hundred seventy-eight billion, seven hundred fifty-six million, five hundred ninety-five thousand, four hundred twenty-eight".