1958061811 has 2 divisors, whose sum is σ = 1958061812. Its totient is φ = 1958061810.

The previous prime is 1958061761. The next prime is 1958061823. The reversal of 1958061811 is 1181608591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1958061811 - 2¹³ = 1958053619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1958061841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979030905 + 979030906.

It is an arithmetic number, because the mean of its divisors is an integer number (979030906).

Almost surely, 2^1958061811 is an apocalyptic number.

1958061811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1958061811 is an equidigital number, since it uses as much as digits as its factorization.

1958061811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 40.

The square root of 1958061811 is about 44249.9922146886. The cubic root of 1958061811 is about 1251.0523002295.

The spelling of 1958061811 in words is "one billion, nine hundred fifty-eight million, sixty-one thousand, eight hundred eleven".