82542989519 has 4 divisors (see below), whose sum is σ = 82787924544. Its totient is φ = 82298054496.

The previous prime is 82542989509. The next prime is 82542989531. The reversal of 82542989519 is 91598924528.

It is a happy number.

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-82542989519 is a prime.

It is a super-2 number, since 2×82542989519² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82542989509) 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, 122467007 + ... + 122467680.

It is an arithmetic number, because the mean of its divisors is an integer number (20696981136).

Almost surely, 2^82542989519 is an apocalyptic number.

82542989519 is a deficient number, since it is larger than the sum of its proper divisors (244935025).

82542989519 is a wasteful number, since it uses less digits than its factorization.

82542989519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244935024.

The product of its digits is 18662400, while the sum is 62.

The spelling of 82542989519 in words is "eighty-two billion, five hundred forty-two million, nine hundred eighty-nine thousand, five hundred nineteen".