25284490686 has 576 divisors, whose sum is σ = 76796149248. Its totient is φ = 6164750592.

The previous prime is 25284490669. The next prime is 25284490703. The reversal of 25284490686 is 68609448252.

It is an interprime number because it is at equal distance from previous prime (25284490669) and next prime (25284490703).

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 377380425 + ... + 377380491.

It is an arithmetic number, because the mean of its divisors is an integer number (133326648).

Almost surely, 2^25284490686 is an apocalyptic number.

25284490686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25284490686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38398074624).

25284490686 is an abundant number, since it is smaller than the sum of its proper divisors (51511658562).

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

25284490686 is a wasteful number, since it uses less digits than its factorization.

25284490686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 25284490686 in words is "twenty-five billion, two hundred eighty-four million, four hundred ninety thousand, six hundred eighty-six".