1977182627831 has 2 divisors, whose sum is σ = 1977182627832. Its totient is φ = 1977182627830.

The previous prime is 1977182627807. The next prime is 1977182627843. The reversal of 1977182627831 is 1387262817791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1977182627831 - 2²⁶ = 1977115518967 is a prime.

It is a super-2 number, since 2×1977182627831² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1977182627851) 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, 988591313915 + 988591313916.

It is an arithmetic number, because the mean of its divisors is an integer number (988591313916).

Almost surely, 2^{1977182627831} is an apocalyptic number.

1977182627831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977182627831 is an equidigital number, since it uses as much as digits as its factorization.

1977182627831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14224896, while the sum is 62.

The spelling of 1977182627831 in words is "one trillion, nine hundred seventy-seven billion, one hundred eighty-two million, six hundred twenty-seven thousand, eight hundred thirty-one".