83740916639 has 2 divisors, whose sum is σ = 83740916640. Its totient is φ = 83740916638.

The previous prime is 83740916561. The next prime is 83740916647. The reversal of 83740916639 is 93661904738.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83740916639 is a prime.

It is a super-2 number, since 2×83740916639² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83740910639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41870458319 + 41870458320.

It is an arithmetic number, because the mean of its divisors is an integer number (41870458320).

Almost surely, 2^83740916639 is an apocalyptic number.

83740916639 is a deficient number, since it is larger than the sum of its proper divisors (1).

83740916639 is an equidigital number, since it uses as much as digits as its factorization.

83740916639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 83740916639 in words is "eighty-three billion, seven hundred forty million, nine hundred sixteen thousand, six hundred thirty-nine".