505871696507 has 4 divisors (see below), whose sum is σ = 507192510720. Its totient is φ = 504550882296.

The previous prime is 505871696479. The next prime is 505871696521. The reversal of 505871696507 is 705696178505.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505871696507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505871696587) 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, 660406532 + ... + 660407297.

It is an arithmetic number, because the mean of its divisors is an integer number (126798127680).

Almost surely, 2^505871696507 is an apocalyptic number.

505871696507 is a deficient number, since it is larger than the sum of its proper divisors (1320814213).

505871696507 is a wasteful number, since it uses less digits than its factorization.

505871696507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320814212.

The product of its (nonzero) digits is 15876000, while the sum is 59.

The spelling of 505871696507 in words is "five hundred five billion, eight hundred seventy-one million, six hundred ninety-six thousand, five hundred seven".