83940784658 has 8 divisors (see below), whose sum is σ = 127209230652. Its totient is φ = 41537707776.

The previous prime is 83940784637. The next prime is 83940784663. The reversal of 83940784658 is 85648704938.

It can be written as a sum of positive squares in 2 ways, for example, as 70295507689 + 13645276969 = 265133^2 + 116813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 83940784658.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216342035 + ... + 216342422.

Almost surely, 2^83940784658 is an apocalyptic number.

83940784658 is a deficient number, since it is larger than the sum of its proper divisors (43268445994).

83940784658 is a wasteful number, since it uses less digits than its factorization.

83940784658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432684556.

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 83940784658 in words is "eighty-three billion, nine hundred forty million, seven hundred eighty-four thousand, six hundred fifty-eight".