26699788973680 has 160 divisors (see below), whose sum is σ = 67863561596928. Its totient is φ = 9738482688000.

The previous prime is 26699788973639. The next prime is 26699788973719. The reversal of 26699788973680 is 8637988799662.

It is a junction number, because it is equal to n+sod(n) for n = 26699788973591 and 26699788973600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328480 + ... + 7314880.

Almost surely, 2^{26699788973680} is an apocalyptic number.

26699788973680 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 26699788973680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33931780798464).

26699788973680 is an abundant number, since it is smaller than the sum of its proper divisors (41163772623248).

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

26699788973680 is a wasteful number, since it uses less digits than its factorization.

26699788973680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986535 (or 6986529 counting only the distinct ones).

The product of its (nonzero) digits is 23702740992, while the sum is 88.

The spelling of 26699788973680 in words is "twenty-six trillion, six hundred ninety-nine billion, seven hundred eighty-eight million, nine hundred seventy-three thousand, six hundred eighty".