83694609840 has 80 divisors (see below), whose sum is σ = 270733886208. Its totient is φ = 21348188928.

The previous prime is 83694609833. The next prime is 83694609877. The reversal of 83694609840 is 4890649638.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7575514 + ... + 7586553.

Almost surely, 2^83694609840 is an apocalyptic number.

83694609840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83694609840 is an abundant number, since it is smaller than the sum of its proper divisors (187039276368).

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

83694609840 is a wasteful number, since it uses less digits than its factorization.

83694609840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15162106 (or 15162100 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 83694609840 in words is "eighty-three billion, six hundred ninety-four million, six hundred nine thousand, eight hundred forty".