26878063680 has 448 divisors, whose sum is σ = 103208206080. Its totient is φ = 6545276928.

The previous prime is 26878063679. The next prime is 26878063691. The reversal of 26878063680 is 8636087862.

It is a happy number.

It is a super-2 number, since 2×26878063680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10893807 + ... + 10896273.

It is an arithmetic number, because the mean of its divisors is an integer number (230375460).

Almost surely, 2^26878063680 is an apocalyptic number.

26878063680 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 26878063680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51604103040).

26878063680 is an abundant number, since it is smaller than the sum of its proper divisors (76330142400).

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

26878063680 is a wasteful number, since it uses less digits than its factorization.

26878063680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603 (or 2587 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 26878063680 in words is "twenty-six billion, eight hundred seventy-eight million, sixty-three thousand, six hundred eighty".