26198979477 has 16 divisors (see below), whose sum is σ = 38115614208. Its totient is φ = 15874832880.

The previous prime is 26198979427. The next prime is 26198979503. The reversal of 26198979477 is 77497989162.

It is not a de Polignac number, because 26198979477 - 2⁸ = 26198979221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26198979427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80838 + ... + 242760.

It is an arithmetic number, because the mean of its divisors is an integer number (2382225888).

Almost surely, 2^26198979477 is an apocalyptic number.

It is an amenable number.

26198979477 is a deficient number, since it is larger than the sum of its proper divisors (11916634731).

26198979477 is a wasteful number, since it uses less digits than its factorization.

26198979477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166840.

The product of its digits is 96018048, while the sum is 69.

The spelling of 26198979477 in words is "twenty-six billion, one hundred ninety-eight million, nine hundred seventy-nine thousand, four hundred seventy-seven".