994581651191 has 2 divisors, whose sum is σ = 994581651192. Its totient is φ = 994581651190.

The previous prime is 994581651071. The next prime is 994581651197. The reversal of 994581651191 is 191156185499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 994581651191 - 2³⁰ = 993507909367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 994581651191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994581651197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497290825595 + 497290825596.

It is an arithmetic number, because the mean of its divisors is an integer number (497290825596).

Almost surely, 2^994581651191 is an apocalyptic number.

994581651191 is a deficient number, since it is larger than the sum of its proper divisors (1).

994581651191 is an equidigital number, since it uses as much as digits as its factorization.

994581651191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 59.

The spelling of 994581651191 in words is "nine hundred ninety-four billion, five hundred eighty-one million, six hundred fifty-one thousand, one hundred ninety-one".