1616040091 has 2 divisors, whose sum is σ = 1616040092. Its totient is φ = 1616040090.

The previous prime is 1616040073. The next prime is 1616040161. The reversal of 1616040091 is 1900406161.

It is a weak prime.

It is an emirp because it is prime and its reverse (1900406161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1616040091 - 2⁵ = 1616040059 is a prime.

It is a super-2 number, since 2×1616040091² = 5223171151438576562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616040691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808020045 + 808020046.

It is an arithmetic number, because the mean of its divisors is an integer number (808020046).

Almost surely, 2^1616040091 is an apocalyptic number.

1616040091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616040091 is an equidigital number, since it uses as much as digits as its factorization.

1616040091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1616040091 is about 40200.0011318408. The cubic root of 1616040091 is about 1173.5025659198.

The spelling of 1616040091 in words is "one billion, six hundred sixteen million, forty thousand, ninety-one".