26988878078 has 4 divisors (see below), whose sum is σ = 40483317120. Its totient is φ = 13494439038.

The previous prime is 26988878051. The next prime is 26988878117. The reversal of 26988878078 is 87087888962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87087888962 = 2 ⋅43543944481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6747219518 + ... + 6747219521.

It is an arithmetic number, because the mean of its divisors is an integer number (10120829280).

Almost surely, 2^26988878078 is an apocalyptic number.

26988878078 is a deficient number, since it is larger than the sum of its proper divisors (13494439042).

26988878078 is a wasteful number, since it uses less digits than its factorization.

26988878078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13494439041.

The product of its (nonzero) digits is 173408256, while the sum is 71.

The spelling of 26988878078 in words is "twenty-six billion, nine hundred eighty-eight million, eight hundred seventy-eight thousand, seventy-eight".