82505280049 has 4 divisors (see below), whose sum is σ = 84424007536. Its totient is φ = 80586552564.

The previous prime is 82505280029. The next prime is 82505280127. The reversal of 82505280049 is 94008250528.

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 82505280049 - 2¹⁵ = 82505247281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1918727443 = 82505280049 / (8 + 2 + 5 + 0 + 5 + 2 + 8 + 0 + 0 + 4 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82505279987 and 82505280014.

It is not an unprimeable number, because it can be changed into a prime (82505280029) 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, 959363679 + ... + 959363764.

It is an arithmetic number, because the mean of its divisors is an integer number (21106001884).

Almost surely, 2^82505280049 is an apocalyptic number.

It is an amenable number.

82505280049 is a deficient number, since it is larger than the sum of its proper divisors (1918727487).

82505280049 is a wasteful number, since it uses less digits than its factorization.

82505280049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918727486.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 82505280049 in words is "eighty-two billion, five hundred five million, two hundred eighty thousand, forty-nine".