630713193781 has 4 divisors (see below), whose sum is σ = 688050756864. Its totient is φ = 573375630700.

The previous prime is 630713193743. The next prime is 630713193793. The reversal of 630713193781 is 187391317036.

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 630713193781 - 2⁷ = 630713193653 is a prime.

It is a super-2 number, since 2×630713193781² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630713193701) 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, 28668781525 + ... + 28668781546.

It is an arithmetic number, because the mean of its divisors is an integer number (172012689216).

Almost surely, 2^630713193781 is an apocalyptic number.

It is an amenable number.

630713193781 is a deficient number, since it is larger than the sum of its proper divisors (57337563083).

630713193781 is a wasteful number, since it uses less digits than its factorization.

630713193781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57337563082.

The product of its (nonzero) digits is 571536, while the sum is 49.

The spelling of 630713193781 in words is "six hundred thirty billion, seven hundred thirteen million, one hundred ninety-three thousand, seven hundred eighty-one".