671080783738 has 4 divisors (see below), whose sum is σ = 1006621175610. Its totient is φ = 335540391868.

The previous prime is 671080783721. The next prime is 671080783739. The reversal of 671080783738 is 837387080176.

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., 520355921449 + 150724862289 = 721357^2 + 388233^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (671080783739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167770195933 + ... + 167770195936.

Almost surely, 2^671080783738 is an apocalyptic number.

671080783738 is a deficient number, since it is larger than the sum of its proper divisors (335540391872).

671080783738 is a wasteful number, since it uses less digits than its factorization.

671080783738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335540391871.

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 671080783738 in words is "six hundred seventy-one billion, eighty million, seven hundred eighty-three thousand, seven hundred thirty-eight".