26780159694 has 16 divisors (see below), whose sum is σ = 53588340432. Its totient is φ = 8922049728.

The previous prime is 26780159669. The next prime is 26780159699. The reversal of 26780159694 is 49695108762.

It is a super-2 number, since 2×26780159694² (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 (26780159699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155109 + ... + 1178064.

It is an arithmetic number, because the mean of its divisors is an integer number (3349271277).

Almost surely, 2^26780159694 is an apocalyptic number.

26780159694 is an abundant number, since it is smaller than the sum of its proper divisors (26808180738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26780159694 is a wasteful number, since it uses less digits than its factorization.

26780159694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335091.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 26780159694 in words is "twenty-six billion, seven hundred eighty million, one hundred fifty-nine thousand, six hundred ninety-four".