26426976991 has 16 divisors (see below), whose sum is σ = 27105154048. Its totient is φ = 25757222400.

The previous prime is 26426976967. The next prime is 26426977007. The reversal of 26426976991 is 19967962462.

It is a cyclic number.

It is not a de Polignac number, because 26426976991 - 2¹⁷ = 26426845919 is a prime.

It is a super-2 number, since 2×26426976991² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26426976491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8465911 + ... + 8469031.

It is an arithmetic number, because the mean of its divisors is an integer number (1694072128).

Almost surely, 2^26426976991 is an apocalyptic number.

26426976991 is a deficient number, since it is larger than the sum of its proper divisors (678177057).

26426976991 is a wasteful number, since it uses less digits than its factorization.

26426976991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402.

The product of its digits is 17635968, while the sum is 61.

The spelling of 26426976991 in words is "twenty-six billion, four hundred twenty-six million, nine hundred seventy-six thousand, nine hundred ninety-one".