630685397661 has 8 divisors (see below), whose sum is σ = 917360578464. Its totient is φ = 382233574320.

The previous prime is 630685397647. The next prime is 630685397677. The reversal of 630685397661 is 166793586036.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 630685397661 - 2¹⁰ = 630685396637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 630685397595 and 630685397604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630685397861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9555839326 + ... + 9555839391.

It is an arithmetic number, because the mean of its divisors is an integer number (114670072308).

Almost surely, 2^630685397661 is an apocalyptic number.

It is an amenable number.

630685397661 is a deficient number, since it is larger than the sum of its proper divisors (286675180803).

630685397661 is a wasteful number, since it uses less digits than its factorization.

630685397661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111678731.

The product of its (nonzero) digits is 29393280, while the sum is 60.

The spelling of 630685397661 in words is "six hundred thirty billion, six hundred eighty-five million, three hundred ninety-seven thousand, six hundred sixty-one".