26109978694 has 8 divisors (see below), whose sum is σ = 39193332048. Its totient is φ = 13045534680.

The previous prime is 26109978689. The next prime is 26109978721. The reversal of 26109978694 is 49687990162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×26109978694² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4723882 + ... + 4729405.

It is an arithmetic number, because the mean of its divisors is an integer number (4899166506).

Almost surely, 2^26109978694 is an apocalyptic number.

26109978694 is a deficient number, since it is larger than the sum of its proper divisors (13083353354).

26109978694 is a wasteful number, since it uses less digits than its factorization.

26109978694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9454670.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 26109978694 in words is "twenty-six billion, one hundred nine million, nine hundred seventy-eight thousand, six hundred ninety-four".