26278693920 has 120 divisors (see below), whose sum is σ = 92741936364. Its totient is φ = 7007648256.

The previous prime is 26278693867. The next prime is 26278693967. The reversal of 26278693920 is 2939687262.

It is a happy number.

26278693920 is a `hidden beast` number, since 2 + 627 + 8 + 6 + 9 + 3 + 9 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25698654864 + 580039056 = 160308^2 + 24084^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1000879 + ... + 1026798.

Almost surely, 2^26278693920 is an apocalyptic number.

26278693920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26278693920 is an abundant number, since it is smaller than the sum of its proper divisors (66463242444).

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

26278693920 is a wasteful number, since it uses less digits than its factorization.

26278693920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027704 (or 2027687 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 26278693920 in words is "twenty-six billion, two hundred seventy-eight million, six hundred ninety-three thousand, nine hundred twenty".