82102449449 has 4 divisors (see below), whose sum is σ = 82287782736. Its totient is φ = 81917116164.

The previous prime is 82102449413. The next prime is 82102449493. The reversal of 82102449449 is 94494420128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82102449449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82102449409) 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, 92665979 + ... + 92666864.

It is an arithmetic number, because the mean of its divisors is an integer number (20571945684).

Almost surely, 2^82102449449 is an apocalyptic number.

It is an amenable number.

82102449449 is a deficient number, since it is larger than the sum of its proper divisors (185333287).

82102449449 is a wasteful number, since it uses less digits than its factorization.

82102449449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185333286.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 82102449449 in words is "eighty-two billion, one hundred two million, four hundred forty-nine thousand, four hundred forty-nine".