420625566544 has 20 divisors (see below), whose sum is σ = 815633929396. Its totient is φ = 210139391232.

The previous prime is 420625566539. The next prime is 420625566593. The reversal of 420625566544 is 445665526024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43801466944 + 376824099600 = 209288^2 + 613860^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10816989 + ... + 10855804.

Almost surely, 2^420625566544 is an apocalyptic number.

It is an amenable number.

420625566544 is a deficient number, since it is larger than the sum of its proper divisors (395008362852).

420625566544 is a wasteful number, since it uses less digits than its factorization.

420625566544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21674014 (or 21674008 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 49.

The spelling of 420625566544 in words is "four hundred twenty billion, six hundred twenty-five million, five hundred sixty-six thousand, five hundred forty-four".