26691727918 has 8 divisors (see below), whose sum is σ = 40165508448. Its totient is φ = 13303225104.

The previous prime is 26691727879. The next prime is 26691727921. The reversal of 26691727918 is 81972719662.

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

It is a super-2 number, since 2×26691727918² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21318646 + ... + 21319897.

It is an arithmetic number, because the mean of its divisors is an integer number (5020688556).

Almost surely, 2^26691727918 is an apocalyptic number.

26691727918 is a deficient number, since it is larger than the sum of its proper divisors (13473780530).

26691727918 is a wasteful number, since it uses less digits than its factorization.

26691727918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42638858.

The product of its digits is 4572288, while the sum is 58.

The spelling of 26691727918 in words is "twenty-six billion, six hundred ninety-one million, seven hundred twenty-seven thousand, nine hundred eighteen".