91850217537 has 64 divisors (see below), whose sum is σ = 139196736000. Its totient is φ = 53450496000.

The previous prime is 91850217527. The next prime is 91850217539. The reversal of 91850217537 is 73571205819.

It is not a de Polignac number, because 91850217537 - 2¹⁶ = 91850152001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91850217539) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30605037 + ... + 30608037.

It is an arithmetic number, because the mean of its divisors is an integer number (2174949000).

Almost surely, 2^91850217537 is an apocalyptic number.

It is an amenable number.

91850217537 is a deficient number, since it is larger than the sum of its proper divisors (47346518463).

91850217537 is a wasteful number, since it uses less digits than its factorization.

91850217537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418.

The product of its (nonzero) digits is 529200, while the sum is 48.

The spelling of 91850217537 in words is "ninety-one billion, eight hundred fifty million, two hundred seventeen thousand, five hundred thirty-seven".