630021004061 has 4 divisors (see below), whose sum is σ = 651745866300. Its totient is φ = 608296141824.

The previous prime is 630021004057. The next prime is 630021004079. The reversal of 630021004061 is 160400120036.

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 524740872100 + 105280131961 = 724390^2 + 324469^2 .

It is a cyclic number.

It is not a de Polignac number, because 630021004061 - 2² = 630021004057 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 (630021004021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10862431076 + ... + 10862431133.

It is an arithmetic number, because the mean of its divisors is an integer number (162936466575).

Almost surely, 2^630021004061 is an apocalyptic number.

It is an amenable number.

630021004061 is a deficient number, since it is larger than the sum of its proper divisors (21724862239).

630021004061 is a wasteful number, since it uses less digits than its factorization.

630021004061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21724862238.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 630021004061 its reverse (160400120036), we get a palindrome (790421124097).

The spelling of 630021004061 in words is "six hundred thirty billion, twenty-one million, four thousand, sixty-one".