25996206840 has 32 divisors (see below), whose sum is σ = 77988620880. Its totient is φ = 6932321792.

The previous prime is 25996206833. The next prime is 25996206851. The reversal of 25996206840 is 4860269952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108317409 + ... + 108317648.

Almost surely, 2^25996206840 is an apocalyptic number.

25996206840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25996206840 is an abundant number, since it is smaller than the sum of its proper divisors (51992414040).

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

25996206840 is a wasteful number, since it uses less digits than its factorization.

25996206840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216635071 (or 216635067 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 25996206840 in words is "twenty-five billion, nine hundred ninety-six million, two hundred six thousand, eight hundred forty".