82491863670 has 96 divisors (see below), whose sum is σ = 222524239392. Its totient is φ = 21987770112.

The previous prime is 82491863669. The next prime is 82491863689. The reversal of 82491863670 is 7636819428.

82491863670 is a `hidden beast` number, since 8 + 2 + 491 + 86 + 3 + 6 + 70 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6391744 + ... + 6404636.

It is an arithmetic number, because the mean of its divisors is an integer number (2317960827).

Almost surely, 2^82491863670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82491863670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111262119696).

82491863670 is an abundant number, since it is smaller than the sum of its proper divisors (140032375722).

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

82491863670 is a wasteful number, since it uses less digits than its factorization.

82491863670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15548 (or 15536 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 82491863670 in words is "eighty-two billion, four hundred ninety-one million, eight hundred sixty-three thousand, six hundred seventy".