82516106790621 has 12 divisors (see below), whose sum is σ = 136217065178272. Its totient is φ = 47152061023176.

The previous prime is 82516106790587. The next prime is 82516106790629. The reversal of 82516106790621 is 12609760161528.

It is a happy number.

82516106790621 is a `hidden beast` number, since 8 + 2 + 5 + 1 + 6 + 1 + 0 + 6 + 7 + 9 + 0 + 621 = 666.

It is not a de Polignac number, because 82516106790621 - 2¹⁹ = 82516106266333 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 (82516106790629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 654889736371 + ... + 654889736496.

Almost surely, 2^{82516106790621} is an apocalyptic number.

It is an amenable number.

82516106790621 is a deficient number, since it is larger than the sum of its proper divisors (53700958387651).

82516106790621 is a wasteful number, since it uses less digits than its factorization.

82516106790621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309779472880 (or 1309779472877 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 82516106790621 in words is "eighty-two trillion, five hundred sixteen billion, one hundred six million, seven hundred ninety thousand, six hundred twenty-one".