91745240073 has 8 divisors (see below), whose sum is σ = 122356416000. Its totient is φ = 61148778768.

The previous prime is 91745240057. The next prime is 91745240089. The reversal of 91745240073 is 37004254719.

It is an interprime number because it is at equal distance from previous prime (91745240057) and next prime (91745240089).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91745240073 - 2⁴ = 91745240057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91745240003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3664098 + ... + 3689051.

It is an arithmetic number, because the mean of its divisors is an integer number (15294552000).

Almost surely, 2^91745240073 is an apocalyptic number.

It is an amenable number.

91745240073 is a deficient number, since it is larger than the sum of its proper divisors (30611175927).

91745240073 is a wasteful number, since it uses less digits than its factorization.

91745240073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7357311.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 91745240073 in words is "ninety-one billion, seven hundred forty-five million, two hundred forty thousand, seventy-three".