82121599055 has 8 divisors (see below), whose sum is σ = 100642640832. Its totient is φ = 64299464608.

The previous prime is 82121599051. The next prime is 82121599081. The reversal of 82121599055 is 55099512128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82121599055 - 2² = 82121599051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82121599051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174726572 + ... + 174727041.

It is an arithmetic number, because the mean of its divisors is an integer number (12580330104).

Almost surely, 2^82121599055 is an apocalyptic number.

82121599055 is a deficient number, since it is larger than the sum of its proper divisors (18521041777).

82121599055 is a wasteful number, since it uses less digits than its factorization.

82121599055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349453665.

The product of its (nonzero) digits is 324000, while the sum is 47.

The spelling of 82121599055 in words is "eighty-two billion, one hundred twenty-one million, five hundred ninety-nine thousand, fifty-five".