26851955971 has 4 divisors (see below), whose sum is σ = 26853149592. Its totient is φ = 26850762352.

The previous prime is 26851955969. The next prime is 26851956013. The reversal of 26851955971 is 17955915862.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 26851955971 - 2¹ = 26851955969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26851955951) 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, 562405 + ... + 608278.

It is an arithmetic number, because the mean of its divisors is an integer number (6713287398).

Almost surely, 2^26851955971 is an apocalyptic number.

26851955971 is a deficient number, since it is larger than the sum of its proper divisors (1193621).

26851955971 is a wasteful number, since it uses less digits than its factorization.

26851955971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193620.

The product of its digits is 6804000, while the sum is 58.

The spelling of 26851955971 in words is "twenty-six billion, eight hundred fifty-one million, nine hundred fifty-five thousand, nine hundred seventy-one".