26385658991 has 8 divisors (see below), whose sum is σ = 26893595904. Its totient is φ = 25882536960.

The previous prime is 26385658973. The next prime is 26385658993. The reversal of 26385658991 is 19985658362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26385658991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26385658993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1192655 + ... + 1214576.

It is an arithmetic number, because the mean of its divisors is an integer number (3361699488).

Almost surely, 2^26385658991 is an apocalyptic number.

26385658991 is a deficient number, since it is larger than the sum of its proper divisors (507936913).

26385658991 is a wasteful number, since it uses less digits than its factorization.

26385658991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407441.

The product of its digits is 27993600, while the sum is 62.

The spelling of 26385658991 in words is "twenty-six billion, three hundred eighty-five million, six hundred fifty-eight thousand, nine hundred ninety-one".