25256263780 has 48 divisors (see below), whose sum is σ = 57975087744. Its totient is φ = 9165797120.

The previous prime is 25256263777. The next prime is 25256263783. The reversal of 25256263780 is 8736265252.

It is an interprime number because it is at equal distance from previous prime (25256263777) and next prime (25256263783).

It is a self number, because there is not a number n which added to its sum of digits gives 25256263780.

It is not an unprimeable number, because it can be changed into a prime (25256263783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3457 + ... + 224776.

It is an arithmetic number, because the mean of its divisors is an integer number (1207814328).

Almost surely, 2^25256263780 is an apocalyptic number.

25256263780 is a gapful number since it is divisible by the number (20) 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 25256263780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28987543872).

25256263780 is an abundant number, since it is smaller than the sum of its proper divisors (32718823964).

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

25256263780 is a wasteful number, since it uses less digits than its factorization.

25256263780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228756 (or 228754 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 25256263780 in words is "twenty-five billion, two hundred fifty-six million, two hundred sixty-three thousand, seven hundred eighty".