83691959761 has 4 divisors (see below), whose sum is σ = 83696922724. Its totient is φ = 83686996800.

The previous prime is 83691959759. The next prime is 83691959777. The reversal of 83691959761 is 16795919638.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36602959761 + 47089000000 = 191319^2 + 217000^2 .

It is a cyclic number.

It is not a de Polignac number, because 83691959761 - 2¹ = 83691959759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83691959693 and 83691959702.

It is not an unprimeable number, because it can be changed into a prime (83691959861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2456100 + ... + 2489941.

It is an arithmetic number, because the mean of its divisors is an integer number (20924230681).

Almost surely, 2^83691959761 is an apocalyptic number.

It is an amenable number.

83691959761 is a deficient number, since it is larger than the sum of its proper divisors (4962963).

83691959761 is a wasteful number, since it uses less digits than its factorization.

83691959761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962962.

The product of its digits is 22044960, while the sum is 64.

The spelling of 83691959761 in words is "eighty-three billion, six hundred ninety-one million, nine hundred fifty-nine thousand, seven hundred sixty-one".