91609976371 has 4 divisors (see below), whose sum is σ = 91613157552. Its totient is φ = 91606795192.

The previous prime is 91609976333. The next prime is 91609976443. The reversal of 91609976371 is 17367990619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91609976371 - 2⁹ = 91609975859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91609946371) 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, 1546996 + ... + 1605121.

It is an arithmetic number, because the mean of its divisors is an integer number (22903289388).

Almost surely, 2^91609976371 is an apocalyptic number.

91609976371 is a deficient number, since it is larger than the sum of its proper divisors (3181181).

91609976371 is a wasteful number, since it uses less digits than its factorization.

91609976371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181180.

The product of its (nonzero) digits is 3857868, while the sum is 58.

The spelling of 91609976371 in words is "ninety-one billion, six hundred nine million, nine hundred seventy-six thousand, three hundred seventy-one".