82785608507506 has 4 divisors (see below), whose sum is σ = 124178412761262. Its totient is φ = 41392804253752.

The previous prime is 82785608507501. The next prime is 82785608507507. The reversal of 82785608507506 is 60570580658728.

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

It can be written as a sum of positive squares in only one way, i.e., 44098564455625 + 38687044051881 = 6640675^2 + 6219891^2 .

It is not an unprimeable number, because it can be changed into a prime (82785608507501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20696402126875 + ... + 20696402126878.

Almost surely, 2^{82785608507506} is an apocalyptic number.

82785608507506 is a deficient number, since it is larger than the sum of its proper divisors (41392804253756).

82785608507506 is a wasteful number, since it uses less digits than its factorization.

82785608507506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41392804253755.

The product of its (nonzero) digits is 225792000, while the sum is 67.

The spelling of 82785608507506 in words is "eighty-two trillion, seven hundred eighty-five billion, six hundred eight million, five hundred seven thousand, five hundred six".