26934350251861 has 4 divisors (see below), whose sum is σ = 29006223348172. Its totient is φ = 24862477155552.

The previous prime is 26934350251849. The next prime is 26934350251967. The reversal of 26934350251861 is 16815205343962.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7501408876900 + 19432941374961 = 2738870^2 + 4408281^2 .

It is a cyclic number.

It is not a de Polignac number, because 26934350251861 - 2¹⁵ = 26934350219093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26934350251841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035936548136 + ... + 1035936548161.

It is an arithmetic number, because the mean of its divisors is an integer number (7251555837043).

Almost surely, 2^{26934350251861} is an apocalyptic number.

It is an amenable number.

26934350251861 is a deficient number, since it is larger than the sum of its proper divisors (2071873096311).

26934350251861 is a wasteful number, since it uses less digits than its factorization.

26934350251861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071873096310.

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 26934350251861 in words is "twenty-six trillion, nine hundred thirty-four billion, three hundred fifty million, two hundred fifty-one thousand, eight hundred sixty-one".