8219542499 has 16 divisors (see below), whose sum is σ = 9813408768. Its totient is φ = 6731289312.

The previous prime is 8219542421. The next prime is 8219542543. The reversal of 8219542499 is 9942459128.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8219542499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8219542499.

It is not an unprimeable number, because it can be changed into a prime (8219544499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114029 + ... + 171585.

It is an arithmetic number, because the mean of its divisors is an integer number (613338048).

Almost surely, 2^8219542499 is an apocalyptic number.

8219542499 is a deficient number, since it is larger than the sum of its proper divisors (1593866269).

8219542499 is a wasteful number, since it uses less digits than its factorization.

8219542499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58474.

The product of its digits is 1866240, while the sum is 53.

The square root of 8219542499 is about 90661.6925663756. The cubic root of 8219542499 is about 2018.1303566975.

The spelling of 8219542499 in words is "eight billion, two hundred nineteen million, five hundred forty-two thousand, four hundred ninety-nine".