82681623999 has 96 divisors (see below), whose sum is σ = 138140533440. Its totient is φ = 47228313600.

The previous prime is 82681623919. The next prime is 82681624009. The reversal of 82681623999 is 99932618628.

82681623999 is a `hidden beast` number, since 82 + 6 + 8 + 162 + 399 + 9 = 666.

It is not a de Polignac number, because 82681623999 - 2¹² = 82681619903 is a prime.

It is a super-2 number, since 2×82681623999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82681623919) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39730639 + ... + 39732719.

It is an arithmetic number, because the mean of its divisors is an integer number (1438963890).

Almost surely, 2^82681623999 is an apocalyptic number.

82681623999 is a deficient number, since it is larger than the sum of its proper divisors (55458909441).

82681623999 is a wasteful number, since it uses less digits than its factorization.

82681623999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473 (or 2470 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The spelling of 82681623999 in words is "eighty-two billion, six hundred eighty-one million, six hundred twenty-three thousand, nine hundred ninety-nine".