420456721610 has 16 divisors (see below), whose sum is σ = 801341046216. Its totient is φ = 158289589248.

The previous prime is 420456721591. The next prime is 420456721651. The reversal of 420456721610 is 16127654024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 413128848001 + 7327873609 = 642751^2 + 85603^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1236637247 + ... + 1236637586.

Almost surely, 2^420456721610 is an apocalyptic number.

420456721610 is a deficient number, since it is larger than the sum of its proper divisors (380884324606).

420456721610 is a wasteful number, since it uses less digits than its factorization.

420456721610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473274857.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 420456721610 in words is "four hundred twenty billion, four hundred fifty-six million, seven hundred twenty-one thousand, six hundred ten".