82974537557 has 2 divisors, whose sum is σ = 82974537558. Its totient is φ = 82974537556.

The previous prime is 82974537433. The next prime is 82974537641. The reversal of 82974537557 is 75573547928.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79031827876 + 3942709681 = 281126^2 + 62791^2 .

It is a cyclic number.

It is not a de Polignac number, because 82974537557 - 2²⁶ = 82907428693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82974537557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82974587557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41487268778 + 41487268779.

It is an arithmetic number, because the mean of its divisors is an integer number (41487268779).

Almost surely, 2^82974537557 is an apocalyptic number.

It is an amenable number.

82974537557 is a deficient number, since it is larger than the sum of its proper divisors (1).

82974537557 is an equidigital number, since it uses as much as digits as its factorization.

82974537557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088000, while the sum is 62.

The spelling of 82974537557 in words is "eighty-two billion, nine hundred seventy-four million, five hundred thirty-seven thousand, five hundred fifty-seven".