83181789864 has 128 divisors (see below), whose sum is σ = 239447116800. Its totient is φ = 26727874560.

The previous prime is 83181789851. The next prime is 83181789913. The reversal of 83181789864 is 46898718138.

83181789864 is a `hidden beast` number, since 8 + 318 + 178 + 98 + 64 = 666.

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, 1696704 + ... + 1745040.

It is an arithmetic number, because the mean of its divisors is an integer number (1870680600).

Almost surely, 2^83181789864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83181789864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119723558400).

83181789864 is an abundant number, since it is smaller than the sum of its proper divisors (156265326936).

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

83181789864 is a wasteful number, since it uses less digits than its factorization.

83181789864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48640 (or 48630 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 63.

The spelling of 83181789864 in words is "eighty-three billion, one hundred eighty-one million, seven hundred eighty-nine thousand, eight hundred sixty-four".