671788846457 has 4 divisors (see below), whose sum is σ = 671801711220. Its totient is φ = 671775981696.

The previous prime is 671788846411. The next prime is 671788846459. The reversal of 671788846457 is 754648887176.

It is a happy number.

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 430193003881 + 241595842576 = 655891^2 + 491524^2 .

It is a cyclic number.

It is not a de Polignac number, because 671788846457 - 2²⁶ = 671721737593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671788846459) 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, 6353732 + ... + 6458597.

It is an arithmetic number, because the mean of its divisors is an integer number (167950427805).

Almost surely, 2^671788846457 is an apocalyptic number.

It is an amenable number.

671788846457 is a deficient number, since it is larger than the sum of its proper divisors (12864763).

671788846457 is a wasteful number, since it uses less digits than its factorization.

671788846457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12864762.

The product of its digits is 505774080, while the sum is 71.

The spelling of 671788846457 in words is "six hundred seventy-one billion, seven hundred eighty-eight million, eight hundred forty-six thousand, four hundred fifty-seven".