8540946591 has 16 divisors (see below), whose sum is σ = 12061060704. Its totient is φ = 5357579264.

The previous prime is 8540946551. The next prime is 8540946641. The reversal of 8540946591 is 1956490458.

It is a cyclic number.

It is not a de Polignac number, because 8540946591 - 2²¹ = 8538849439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8540946511) 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 15 ways as a sum of consecutive naturals, for example, 187165 + ... + 228281.

It is an arithmetic number, because the mean of its divisors is an integer number (753816294).

Almost surely, 2^8540946591 is an apocalyptic number.

8540946591 is a deficient number, since it is larger than the sum of its proper divisors (3520114113).

8540946591 is a wasteful number, since it uses less digits than its factorization.

8540946591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45210.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 8540946591 is about 92417.2418491268. The cubic root of 8540946591 is about 2044.0993589867.

The spelling of 8540946591 in words is "eight billion, five hundred forty million, nine hundred forty-six thousand, five hundred ninety-one".