26706786457 has 8 divisors (see below), whose sum is σ = 28764178184. Its totient is φ = 24649826688.

The previous prime is 26706786427. The next prime is 26706786481. The reversal of 26706786457 is 75468760762.

It can be written as a sum of positive squares in 4 ways, for example, as 2541773056 + 24165013401 = 50416^2 + 155451^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26706786457 - 2²³ = 26698397849 is a prime.

It is a super-2 number, since 2×26706786457² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26706786427) 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, 26653 + ... + 232645.

It is an arithmetic number, because the mean of its divisors is an integer number (3595522273).

Almost surely, 2^26706786457 is an apocalyptic number.

It is an amenable number.

26706786457 is a deficient number, since it is larger than the sum of its proper divisors (2057391727).

26706786457 is a wasteful number, since it uses less digits than its factorization.

26706786457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215979.

The product of its (nonzero) digits is 23708160, while the sum is 58.

The spelling of 26706786457 in words is "twenty-six billion, seven hundred six million, seven hundred eighty-six thousand, four hundred fifty-seven".