91613631619 has 2 divisors, whose sum is σ = 91613631620. Its totient is φ = 91613631618.

The previous prime is 91613631581. The next prime is 91613631631.

91613631619 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 91613631619 - 2¹⁹ = 91613107331 is a prime.

It is a super-2 number, since 2×91613631619² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91613631019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45806815809 + 45806815810.

It is an arithmetic number, because the mean of its divisors is an integer number (45806815810).

Almost surely, 2^91613631619 is an apocalyptic number.

91613631619 is a deficient number, since it is larger than the sum of its proper divisors (1).

91613631619 is an equidigital number, since it uses as much as digits as its factorization.

91613631619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 46.

The spelling of 91613631619 in words is "ninety-one billion, six hundred thirteen million, six hundred thirty-one thousand, six hundred nineteen".