91886336049 has 4 divisors (see below), whose sum is σ = 122515114736. Its totient is φ = 61257557364.

The previous prime is 91886336041. The next prime is 91886336057. The reversal of 91886336049 is 94063368819.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (91886336041) and next prime (91886336057).

It is not a de Polignac number, because 91886336049 - 2³ = 91886336041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91886336049.

It is not an unprimeable number, because it can be changed into a prime (91886336041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15314389339 + ... + 15314389344.

It is an arithmetic number, because the mean of its divisors is an integer number (30628778684).

Almost surely, 2^91886336049 is an apocalyptic number.

It is an amenable number.

91886336049 is a deficient number, since it is larger than the sum of its proper divisors (30628778687).

91886336049 is a wasteful number, since it uses less digits than its factorization.

91886336049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30628778686.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 91886336049 in words is "ninety-one billion, eight hundred eighty-six million, three hundred thirty-six thousand, forty-nine".