26691135999 has 32 divisors (see below), whose sum is σ = 40229376000. Its totient is φ = 15600180960.

The previous prime is 26691135949. The next prime is 26691136001. The reversal of 26691135999 is 99953119662.

It is not a de Polignac number, because 26691135999 - 2⁸ = 26691135743 is a prime.

It is a super-2 number, since 2×26691135999² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26691135949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6949 + ... + 231150.

It is an arithmetic number, because the mean of its divisors is an integer number (1257168000).

Almost surely, 2^26691135999 is an apocalyptic number.

26691135999 is a deficient number, since it is larger than the sum of its proper divisors (13538240001).

26691135999 is a wasteful number, since it uses less digits than its factorization.

26691135999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238235.

The product of its digits is 7085880, while the sum is 60.

The spelling of 26691135999 in words is "twenty-six billion, six hundred ninety-one million, one hundred thirty-five thousand, nine hundred ninety-nine".