670781848313 has 4 divisors (see below), whose sum is σ = 672375154788. Its totient is φ = 669188541840.

The previous prime is 670781848307. The next prime is 670781848337. The reversal of 670781848313 is 313848187076.

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 112648839424 + 558133008889 = 335632^2 + 747083^2 .

It is a cyclic number.

It is not a de Polignac number, because 670781848313 - 2⁶ = 670781848249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670781848213) 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, 796652606 + ... + 796653447.

It is an arithmetic number, because the mean of its divisors is an integer number (168093788697).

Almost surely, 2^670781848313 is an apocalyptic number.

It is an amenable number.

670781848313 is a deficient number, since it is larger than the sum of its proper divisors (1593306475).

670781848313 is a wasteful number, since it uses less digits than its factorization.

670781848313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593306474.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 670781848313 in words is "six hundred seventy billion, seven hundred eighty-one million, eight hundred forty-eight thousand, three hundred thirteen".