9216541691 has 4 divisors (see below), whose sum is σ = 10533190512. Its totient is φ = 7899892872.

The previous prime is 9216541673. The next prime is 9216541723. The reversal of 9216541691 is 1961456129.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9216541691 is a prime.

It is a super-2 number, since 2×9216541691² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9216541651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658324400 + ... + 658324413.

It is an arithmetic number, because the mean of its divisors is an integer number (2633297628).

Almost surely, 2^9216541691 is an apocalyptic number.

9216541691 is a deficient number, since it is larger than the sum of its proper divisors (1316648821).

9216541691 is a wasteful number, since it uses less digits than its factorization.

9216541691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316648820.

The product of its digits is 116640, while the sum is 44.

The square root of 9216541691 is about 96002.8212658357. The cubic root of 9216541691 is about 2096.6341918779.

The spelling of 9216541691 in words is "nine billion, two hundred sixteen million, five hundred forty-one thousand, six hundred ninety-one".