26251215680 has 28 divisors (see below), whose sum is σ = 62510708100. Its totient is φ = 10500486144.

The previous prime is 26251215647. The next prime is 26251215691. The reversal of 26251215680 is 8651215262.

It can be written as a sum of positive squares in 2 ways, for example, as 6956894464 + 19294321216 = 83408^2 + 138904^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41017205 + ... + 41017844.

Almost surely, 2^26251215680 is an apocalyptic number.

26251215680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26251215680 is an abundant number, since it is smaller than the sum of its proper divisors (36259492420).

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

26251215680 is an equidigital number, since it uses as much as digits as its factorization.

26251215680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82035066 (or 82035056 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 26251215680 in words is "twenty-six billion, two hundred fifty-one million, two hundred fifteen thousand, six hundred eighty".