26940201957 has 6 divisors (see below), whose sum is σ = 38913625062. Its totient is φ = 17960134632.

The previous prime is 26940201947. The next prime is 26940201997. The reversal of 26940201957 is 75910204962.

It can be written as a sum of positive squares in only one way, i.e., 16013890116 + 10926311841 = 126546^2 + 104529^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26940201957 is a prime.

It is a super-3 number, since 3×26940201957³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26940201907) 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 5 ways as a sum of consecutive naturals, for example, 1496677878 + ... + 1496677895.

It is an arithmetic number, because the mean of its divisors is an integer number (6485604177).

Almost surely, 2^26940201957 is an apocalyptic number.

It is an amenable number.

26940201957 is a deficient number, since it is larger than the sum of its proper divisors (11973423105).

26940201957 is a wasteful number, since it uses less digits than its factorization.

26940201957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993355779 (or 2993355776 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 26940201957 in words is "twenty-six billion, nine hundred forty million, two hundred one thousand, nine hundred fifty-seven".