82686363840 has 112 divisors (see below), whose sum is σ = 291699147360. Its totient is φ = 22049694720.

The previous prime is 82686363803. The next prime is 82686363841. The reversal of 82686363840 is 4836368628.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (82686363841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4776451 + ... + 4793730.

Almost surely, 2^82686363840 is an apocalyptic number.

82686363840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82686363840 is an abundant number, since it is smaller than the sum of its proper divisors (209012783520).

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

82686363840 is a wasteful number, since it uses less digits than its factorization.

82686363840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570207 (or 9570191 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 54.

The spelling of 82686363840 in words is "eighty-two billion, six hundred eighty-six million, three hundred sixty-three thousand, eight hundred forty".