83326911787621 has 2 divisors, whose sum is σ = 83326911787622. Its totient is φ = 83326911787620.

The previous prime is 83326911787549. The next prime is 83326911787633. The reversal of 83326911787621 is 12678711962338.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67886295190596 + 15440616597025 = 8239314^2 + 3929455^2 .

It is a cyclic number.

It is not a de Polignac number, because 83326911787621 - 2¹¹ = 83326911785573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83326911787121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41663455893810 + 41663455893811.

It is an arithmetic number, because the mean of its divisors is an integer number (41663455893811).

Almost surely, 2^{83326911787621} is an apocalyptic number.

It is an amenable number.

83326911787621 is a deficient number, since it is larger than the sum of its proper divisors (1).

83326911787621 is an equidigital number, since it uses as much as digits as its factorization.

83326911787621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 64.

The spelling of 83326911787621 in words is "eighty-three trillion, three hundred twenty-six billion, nine hundred eleven million, seven hundred eighty-seven thousand, six hundred twenty-one".