82985555497 has 4 divisors (see below), whose sum is σ = 89369059780. Its totient is φ = 76602051216.

The previous prime is 82985555489. The next prime is 82985555507. The reversal of 82985555497 is 79455558928.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42029510121 + 40956045376 = 205011^2 + 202376^2 .

It is a cyclic number.

It is not a de Polignac number, because 82985555497 - 2³ = 82985555489 is a prime.

It is a super-2 number, since 2×82985555497² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82985555407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191752122 + ... + 3191752147.

It is an arithmetic number, because the mean of its divisors is an integer number (22342264945).

Almost surely, 2^82985555497 is an apocalyptic number.

It is an amenable number.

82985555497 is a deficient number, since it is larger than the sum of its proper divisors (6383504283).

82985555497 is a wasteful number, since it uses less digits than its factorization.

82985555497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383504282.

The product of its digits is 181440000, while the sum is 67.

The spelling of 82985555497 in words is "eighty-two billion, nine hundred eighty-five million, five hundred fifty-five thousand, four hundred ninety-seven".