82120800678 has 64 divisors (see below), whose sum is σ = 203593678848. Its totient is φ = 21544289280.

The previous prime is 82120800677. The next prime is 82120800701. The reversal of 82120800678 is 87600802128.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82120800677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1373350 + ... + 1431897.

It is an arithmetic number, because the mean of its divisors is an integer number (3181151232).

Almost surely, 2^82120800678 is an apocalyptic number.

82120800678 is an abundant number, since it is smaller than the sum of its proper divisors (121472878170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82120800678 is a wasteful number, since it uses less digits than its factorization.

82120800678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805317.

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 82120800678 in words is "eighty-two billion, one hundred twenty million, eight hundred thousand, six hundred seventy-eight".