671283623761 has 3 divisors (see below), whose sum is σ = 671284443081. Its totient is φ = 671282804442.

The previous prime is 671283623723. The next prime is 671283623807. The reversal of 671283623761 is 167326382176.

The square root of 671283623761 is 819319.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 671283623761 - 2²⁷ = 671149406033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671283623699 and 671283623708.

It is not an unprimeable number, because it can be changed into a prime (671283621761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 409660 + ... + 1228978.

It is an arithmetic number, because the mean of its divisors is an integer number (223761481027).

Almost surely, 2^671283623761 is an apocalyptic number.

671283623761 is the 819319-th square number.

671283623761 is the 409660-th centered octagonal number.

It is an amenable number.

671283623761 is a deficient number, since it is larger than the sum of its proper divisors (819320).

671283623761 is an frugal number, since it uses more digits than its factorization.

671283623761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638638 (or 819319 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 52.

It can be divided in two parts, 671283 and 623761, that added together give a square (1295044 = 1138²).

The spelling of 671283623761 in words is "six hundred seventy-one billion, two hundred eighty-three million, six hundred twenty-three thousand, seven hundred sixty-one".