646610317177 has 4 divisors (see below), whose sum is σ = 705393073296. Its totient is φ = 587827561060.

The previous prime is 646610317163. The next prime is 646610317201. The reversal of 646610317177 is 771713016646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 646610317177 - 2¹¹ = 646610315129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646610317177.

It is not an unprimeable number, because it can be changed into a prime (646610314177) 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, 29391378043 + ... + 29391378064.

It is an arithmetic number, because the mean of its divisors is an integer number (176348268324).

Almost surely, 2^646610317177 is an apocalyptic number.

It is an amenable number.

646610317177 is a deficient number, since it is larger than the sum of its proper divisors (58782756119).

646610317177 is a wasteful number, since it uses less digits than its factorization.

646610317177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58782756118.

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 646610317177 in words is "six hundred forty-six billion, six hundred ten million, three hundred seventeen thousand, one hundred seventy-seven".