25678226840 has 32 divisors (see below), whose sum is σ = 66029726880. Its totient is φ = 8803963392.

The previous prime is 25678226831. The next prime is 25678226843. The reversal of 25678226840 is 4862287652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25678226843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45853697 + ... + 45854256.

It is an arithmetic number, because the mean of its divisors is an integer number (2063428965).

Almost surely, 2^25678226840 is an apocalyptic number.

25678226840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25678226840 is an abundant number, since it is smaller than the sum of its proper divisors (40351500040).

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

25678226840 is a wasteful number, since it uses less digits than its factorization.

25678226840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91707971 (or 91707967 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 25678226840 in words is "twenty-five billion, six hundred seventy-eight million, two hundred twenty-six thousand, eight hundred forty".