82108537920 has 112 divisors (see below), whose sum is σ = 289660705920. Its totient is φ = 21895607808.

The previous prime is 82108537879. The next prime is 82108537939. The reversal of 82108537920 is 2973580128.

It is a happy number.

82108537920 is a `hidden beast` number, since 8 + 2 + 108 + 537 + 9 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4743012 + ... + 4760291.

Almost surely, 2^82108537920 is an apocalyptic number.

82108537920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82108537920 is an abundant number, since it is smaller than the sum of its proper divisors (207552168000).

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

82108537920 is a wasteful number, since it uses less digits than its factorization.

82108537920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503329 (or 9503313 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 82108537920 in words is "eighty-two billion, one hundred eight million, five hundred thirty-seven thousand, nine hundred twenty".