82990434771 has 12 divisors (see below), whose sum is σ = 119883348000. Its totient is φ = 55323137040.

The previous prime is 82990434763. The next prime is 82990434817. The reversal of 82990434771 is 17743409928.

82990434771 is a `hidden beast` number, since 8 + 299 + 0 + 4 + 347 + 7 + 1 = 666.

It is not a de Polignac number, because 82990434771 - 2³ = 82990434763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82990434721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 177396 + ... + 444353.

It is an arithmetic number, because the mean of its divisors is an integer number (9990279000).

Almost surely, 2^82990434771 is an apocalyptic number.

82990434771 is a deficient number, since it is larger than the sum of its proper divisors (36892913229).

82990434771 is a wasteful number, since it uses less digits than its factorization.

82990434771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636586 (or 636583 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 82990434771 in words is "eighty-two billion, nine hundred ninety million, four hundred thirty-four thousand, seven hundred seventy-one".