83606461781 has 8 divisors (see below), whose sum is σ = 84763578240. Its totient is φ = 82449664992.

The previous prime is 83606461777. The next prime is 83606461823. The reversal of 83606461781 is 18716460638.

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

It is a cyclic number.

It is not a de Polignac number, because 83606461781 - 2² = 83606461777 is a prime.

It is a super-2 number, since 2×83606461781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83606461721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473060 + ... + 625298.

It is an arithmetic number, because the mean of its divisors is an integer number (10595447280).

Almost surely, 2^83606461781 is an apocalyptic number.

It is an amenable number.

83606461781 is a deficient number, since it is larger than the sum of its proper divisors (1157116459).

83606461781 is a wasteful number, since it uses less digits than its factorization.

83606461781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159835.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 83606461781 in words is "eighty-three billion, six hundred six million, four hundred sixty-one thousand, seven hundred eighty-one".