27719961923 has 2 divisors, whose sum is σ = 27719961924. Its totient is φ = 27719961922.

The previous prime is 27719961877. The next prime is 27719961943. The reversal of 27719961923 is 32916991772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27719961923 - 2⁸ = 27719961667 is a prime.

It is not a weakly prime, because it can be changed into another prime (27719961943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13859980961 + 13859980962.

It is an arithmetic number, because the mean of its divisors is an integer number (13859980962).

Almost surely, 2^27719961923 is an apocalyptic number.

27719961923 is a deficient number, since it is larger than the sum of its proper divisors (1).

27719961923 is an equidigital number, since it uses as much as digits as its factorization.

27719961923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912, while the sum is 56.

The spelling of 27719961923 in words is "twenty-seven billion, seven hundred nineteen million, nine hundred sixty-one thousand, nine hundred twenty-three".