26898069778 has 16 divisors (see below), whose sum is σ = 40430966040. Its totient is φ = 13421108736.

The previous prime is 26898069773. The next prime is 26898069799. The reversal of 26898069778 is 87796089862.

It can be written as a sum of positive squares in 4 ways, for example, as 23185239289 + 3712830489 = 152267^2 + 60933^2 .

It is not an unprimeable number, because it can be changed into a prime (26898069773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2335458 + ... + 2346946.

Almost surely, 2^26898069778 is an apocalyptic number.

26898069778 is a deficient number, since it is larger than the sum of its proper divisors (13532896262).

26898069778 is a wasteful number, since it uses less digits than its factorization.

26898069778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13821.

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 26898069778 in words is "twenty-six billion, eight hundred ninety-eight million, sixty-nine thousand, seven hundred seventy-eight".