26992218816 has 448 divisors, whose sum is σ = 85394718720. Its totient is φ = 8346240000.

The previous prime is 26992218703. The next prime is 26992218839. The reversal of 26992218816 is 61881229962.

It is a happy number.

26992218816 is a `hidden beast` number, since 269 + 92 + 218 + 81 + 6 = 666.

It is a super-2 number, since 2×26992218816² (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 a nude number because it is divisible by every one of its digits.

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, 178756341 + ... + 178756491.

Almost surely, 2^26992218816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26992218816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42697359360).

26992218816 is an abundant number, since it is smaller than the sum of its proper divisors (58402499904).

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

26992218816 is a wasteful number, since it uses less digits than its factorization.

26992218816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 305 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The spelling of 26992218816 in words is "twenty-six billion, nine hundred ninety-two million, two hundred eighteen thousand, eight hundred sixteen".