83661822816638 has 24 divisors (see below), whose sum is σ = 137950087903320. Its totient is φ = 38024850006000.

The previous prime is 83661822816629. The next prime is 83661822816641.

83661822816638 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11941028 + ... + 17604311.

It is an arithmetic number, because the mean of its divisors is an integer number (5747920329305).

Almost surely, 2^{83661822816638} is an apocalyptic number.

83661822816638 is a deficient number, since it is larger than the sum of its proper divisors (54288265086682).

83661822816638 is a wasteful number, since it uses less digits than its factorization.

83661822816638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29557064 (or 29557053 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 68.

The spelling of 83661822816638 in words is "eighty-three trillion, six hundred sixty-one billion, eight hundred twenty-two million, eight hundred sixteen thousand, six hundred thirty-eight".