83445781049 has 2 divisors, whose sum is σ = 83445781050. Its totient is φ = 83445781048.

The previous prime is 83445780961. The next prime is 83445781063. The reversal of 83445781049 is 94018754438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55174721449 + 28271059600 = 234893^2 + 168140^2 .

It is a cyclic number.

It is not a de Polignac number, because 83445781049 - 2¹⁶ = 83445715513 is a prime.

It is not a weakly prime, because it can be changed into another prime (83445711049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41722890524 + 41722890525.

It is an arithmetic number, because the mean of its divisors is an integer number (41722890525).

Almost surely, 2^83445781049 is an apocalyptic number.

It is an amenable number.

83445781049 is a deficient number, since it is larger than the sum of its proper divisors (1).

83445781049 is an equidigital number, since it uses as much as digits as its factorization.

83445781049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 83445781049 in words is "eighty-three billion, four hundred forty-five million, seven hundred eighty-one thousand, forty-nine".