83205815121263 has 4 divisors (see below), whose sum is σ = 83276268818568. Its totient is φ = 83135361423960.

The previous prime is 83205815121251. The next prime is 83205815121329. The reversal of 83205815121263 is 36212151850238.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83205815121263 - 2²⁰ = 83205814072687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83205815127263) 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, 35226846881 + ... + 35226849242.

It is an arithmetic number, because the mean of its divisors is an integer number (20819067204642).

Almost surely, 2^{83205815121263} is an apocalyptic number.

83205815121263 is a deficient number, since it is larger than the sum of its proper divisors (70453697305).

83205815121263 is a wasteful number, since it uses less digits than its factorization.

83205815121263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70453697304.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 83205815121263 in words is "eighty-three trillion, two hundred five billion, eight hundred fifteen million, one hundred twenty-one thousand, two hundred sixty-three".