25286358840 has 128 divisors (see below), whose sum is σ = 76869112320. Its totient is φ = 6653836800.

The previous prime is 25286358833. The next prime is 25286358869. The reversal of 25286358840 is 4885368252.

It is a super-2 number, since 2×25286358840² (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 31 ways as a sum of consecutive naturals, for example, 2840877 + ... + 2849763.

It is an arithmetic number, because the mean of its divisors is an integer number (600539940).

Almost surely, 2^25286358840 is an apocalyptic number.

25286358840 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 25286358840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38434556160).

25286358840 is an abundant number, since it is smaller than the sum of its proper divisors (51582753480).

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

25286358840 is a wasteful number, since it uses less digits than its factorization.

25286358840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9213 (or 9209 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 51.

It can be divided in two parts, 25286 and 358840, that added together give a triangular number (384126 = T₈₇₆).

The spelling of 25286358840 in words is "twenty-five billion, two hundred eighty-six million, three hundred fifty-eight thousand, eight hundred forty".