82731320826 has 64 divisors (see below), whose sum is σ = 206321955840. Its totient is φ = 21485439360.

The previous prime is 82731320809. The next prime is 82731320831. The reversal of 82731320826 is 62802313728.

It is a super-2 number, since 2×82731320826² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5878390 + ... + 5892446.

It is an arithmetic number, because the mean of its divisors is an integer number (3223780560).

Almost surely, 2^82731320826 is an apocalyptic number.

82731320826 is an abundant number, since it is smaller than the sum of its proper divisors (123590635014).

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

82731320826 is a wasteful number, since it uses less digits than its factorization.

82731320826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26819.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 82731320826 in words is "eighty-two billion, seven hundred thirty-one million, three hundred twenty thousand, eight hundred twenty-six".