82154698449 has 4 divisors (see below), whose sum is σ = 109539597936. Its totient is φ = 54769798964.

The previous prime is 82154698441. The next prime is 82154698471. The reversal of 82154698449 is 94489645128.

It is a happy number.

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 not a de Polignac number, because 82154698449 - 2³ = 82154698441 is a prime.

It is a super-2 number, since 2×82154698449² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82154698392 and 82154698401.

It is not an unprimeable number, because it can be changed into a prime (82154698441) 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 3 ways as a sum of consecutive naturals, for example, 13692449739 + ... + 13692449744.

It is an arithmetic number, because the mean of its divisors is an integer number (27384899484).

Almost surely, 2^82154698449 is an apocalyptic number.

It is an amenable number.

82154698449 is a deficient number, since it is larger than the sum of its proper divisors (27384899487).

82154698449 is a wasteful number, since it uses less digits than its factorization.

82154698449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27384899486.

The product of its digits is 19906560, while the sum is 60.

The spelling of 82154698449 in words is "eighty-two billion, one hundred fifty-four million, six hundred ninety-eight thousand, four hundred forty-nine".