83557272437 has 2 divisors, whose sum is σ = 83557272438. Its totient is φ = 83557272436.

The previous prime is 83557272371. The next prime is 83557272499. The reversal of 83557272437 is 73427275538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48368765041 + 35188507396 = 219929^2 + 187586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83557272437 is a prime.

It is a super-2 number, since 2×83557272437² (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 (83559272437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41778636218 + 41778636219.

It is an arithmetic number, because the mean of its divisors is an integer number (41778636219).

Almost surely, 2^83557272437 is an apocalyptic number.

It is an amenable number.

83557272437 is a deficient number, since it is larger than the sum of its proper divisors (1).

83557272437 is an equidigital number, since it uses as much as digits as its factorization.

83557272437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9878400, while the sum is 53.

The spelling of 83557272437 in words is "eighty-three billion, five hundred fifty-seven million, two hundred seventy-two thousand, four hundred thirty-seven".