82991899892 has 48 divisors (see below), whose sum is σ = 160408046400. Its totient is φ = 37257615360.

The previous prime is 82991899819. The next prime is 82991899943. The reversal of 82991899892 is 29899819928.

It is a super-2 number, since 2×82991899892² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 1145234 + ... + 1215542.

It is an arithmetic number, because the mean of its divisors is an integer number (3341834300).

Almost surely, 2^82991899892 is an apocalyptic number.

It is an amenable number.

82991899892 is a deficient number, since it is larger than the sum of its proper divisors (77416146508).

82991899892 is a wasteful number, since it uses less digits than its factorization.

82991899892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70656 (or 70654 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 74.

The spelling of 82991899892 in words is "eighty-two billion, nine hundred ninety-one million, eight hundred ninety-nine thousand, eight hundred ninety-two".