82815533357 has 2 divisors, whose sum is σ = 82815533358. Its totient is φ = 82815533356.

The previous prime is 82815533347. The next prime is 82815533393. The reversal of 82815533357 is 75333551828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45124805476 + 37690727881 = 212426^2 + 194141^2 .

It is a cyclic number.

It is not a de Polignac number, because 82815533357 - 2¹² = 82815529261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82815533347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41407766678 + 41407766679.

It is an arithmetic number, because the mean of its divisors is an integer number (41407766679).

Almost surely, 2^82815533357 is an apocalyptic number.

It is an amenable number.

82815533357 is a deficient number, since it is larger than the sum of its proper divisors (1).

82815533357 is an equidigital number, since it uses as much as digits as its factorization.

82815533357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024000, while the sum is 50.

The spelling of 82815533357 in words is "eighty-two billion, eight hundred fifteen million, five hundred thirty-three thousand, three hundred fifty-seven".