630746136308621 has 4 divisors (see below), whose sum is σ = 630789507438912. Its totient is φ = 630702765178332.

The previous prime is 630746136308611. The next prime is 630746136308657. The reversal of 630746136308621 is 126803631647036.

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 630746136308621 - 2⁴² = 626348089797517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630746136308611) 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, 21685543331 + ... + 21685572416.

It is an arithmetic number, because the mean of its divisors is an integer number (157697376859728).

Almost surely, 2^{630746136308621} is an apocalyptic number.

It is an amenable number.

630746136308621 is a deficient number, since it is larger than the sum of its proper divisors (43371130291).

630746136308621 is a wasteful number, since it uses less digits than its factorization.

630746136308621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43371130290.

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 630746136308621 in words is "six hundred thirty trillion, seven hundred forty-six billion, one hundred thirty-six million, three hundred eight thousand, six hundred twenty-one".