25858289340 has 240 divisors, whose sum is σ = 87544483488. Its totient is φ = 6351561216.

The previous prime is 25858289311. The next prime is 25858289383. The reversal of 25858289340 is 4398285852.

It is a happy number.

25858289340 is a `hidden beast` number, since 2 + 58 + 582 + 8 + 9 + 3 + 4 + 0 = 666.

It is a super-2 number, since 2×25858289340² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12908779 + ... + 12910781.

Almost surely, 2^25858289340 is an apocalyptic number.

25858289340 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 25858289340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43772241744).

25858289340 is an abundant number, since it is smaller than the sum of its proper divisors (61686194148).

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

25858289340 is a wasteful number, since it uses less digits than its factorization.

25858289340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2639 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 25858289340 in words is "twenty-five billion, eight hundred fifty-eight million, two hundred eighty-nine thousand, three hundred forty".