83581861757 has 2 divisors, whose sum is σ = 83581861758. Its totient is φ = 83581861756.

The previous prime is 83581861703. The next prime is 83581861787. The reversal of 83581861757 is 75716818538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83445299161 + 136562596 = 288869^2 + 11686^2 .

It is a cyclic number.

It is not a de Polignac number, because 83581861757 - 2⁸ = 83581861501 is a prime.

It is a super-2 number, since 2×83581861757² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83581861696 and 83581861705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83581861787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41790930878 + 41790930879.

It is an arithmetic number, because the mean of its divisors is an integer number (41790930879).

Almost surely, 2^83581861757 is an apocalyptic number.

It is an amenable number.

83581861757 is a deficient number, since it is larger than the sum of its proper divisors (1).

83581861757 is an equidigital number, since it uses as much as digits as its factorization.

83581861757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11289600, while the sum is 59.

The spelling of 83581861757 in words is "eighty-three billion, five hundred eighty-one million, eight hundred sixty-one thousand, seven hundred fifty-seven".