82173781500 has 48 divisors (see below), whose sum is σ = 239290056096. Its totient is φ = 21913008000.

The previous prime is 82173781489. The next prime is 82173781513. The reversal of 82173781500 is 518737128.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27389761 + ... + 27392760.

It is an arithmetic number, because the mean of its divisors is an integer number (4985209502).

Almost surely, 2^82173781500 is an apocalyptic number.

It is an amenable number.

82173781500 is an abundant number, since it is smaller than the sum of its proper divisors (157116274596).

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

82173781500 is a wasteful number, since it uses less digits than its factorization.

82173781500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54782543 (or 54782531 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 82173781500 in words is "eighty-two billion, one hundred seventy-three million, seven hundred eighty-one thousand, five hundred".