1951882821611 has 2 divisors, whose sum is σ = 1951882821612. Its totient is φ = 1951882821610.

The previous prime is 1951882821589. The next prime is 1951882821613. The reversal of 1951882821611 is 1161282881591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1951882821611 - 2¹⁴ = 1951882805227 is a prime.

Together with 1951882821613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1951882821613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975941410805 + 975941410806.

It is an arithmetic number, because the mean of its divisors is an integer number (975941410806).

Almost surely, 2^{1951882821611} is an apocalyptic number.

1951882821611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951882821611 is an equidigital number, since it uses as much as digits as its factorization.

1951882821611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 53.

The spelling of 1951882821611 in words is "one trillion, nine hundred fifty-one billion, eight hundred eighty-two million, eight hundred twenty-one thousand, six hundred eleven".