26680342680 has 128 divisors (see below), whose sum is σ = 89006558400. Its totient is φ = 7108992000.

The previous prime is 26680342673. The next prime is 26680342721. The reversal of 26680342680 is 8624308662.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1417330 + ... + 1436030.

Almost surely, 2^26680342680 is an apocalyptic number.

26680342680 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 26680342680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44503279200).

26680342680 is an abundant number, since it is smaller than the sum of its proper divisors (62326215720).

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

26680342680 is a wasteful number, since it uses less digits than its factorization.

26680342680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20042 (or 20032 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 26680342680 in words is "twenty-six billion, six hundred eighty million, three hundred forty-two thousand, six hundred eighty".