2156679340927 has 2 divisors, whose sum is σ = 2156679340928. Its totient is φ = 2156679340926.

The previous prime is 2156679340919. The next prime is 2156679340967. The reversal of 2156679340927 is 7290439766512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156679340927 - 2³ = 2156679340919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156679340967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078339670463 + 1078339670464.

It is an arithmetic number, because the mean of its divisors is an integer number (1078339670464).

Almost surely, 2^{2156679340927} is an apocalyptic number.

2156679340927 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156679340927 is an equidigital number, since it uses as much as digits as its factorization.

2156679340927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34292160, while the sum is 61.

The spelling of 2156679340927 in words is "two trillion, one hundred fifty-six billion, six hundred seventy-nine million, three hundred forty thousand, nine hundred twenty-seven".