1977592651871 has 2 divisors, whose sum is σ = 1977592651872. Its totient is φ = 1977592651870.

The previous prime is 1977592651747. The next prime is 1977592651873. The reversal of 1977592651871 is 1781562957791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1977592651871 is a prime.

Together with 1977592651873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1977592651873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988796325935 + 988796325936.

It is an arithmetic number, because the mean of its divisors is an integer number (988796325936).

Almost surely, 2^{1977592651871} is an apocalyptic number.

1977592651871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977592651871 is an equidigital number, since it uses as much as digits as its factorization.

1977592651871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66679200, while the sum is 68.

The spelling of 1977592651871 in words is "one trillion, nine hundred seventy-seven billion, five hundred ninety-two million, six hundred fifty-one thousand, eight hundred seventy-one".