420911595729 has 9 divisors (see below), whose sum is σ = 607986227433. Its totient is φ = 280606432932.

The previous prime is 420911595719. The next prime is 420911595763. The reversal of 420911595729 is 927595119024.

It is a happy number.

The square root of 420911595729 is 648777.

It is a perfect power (a square), and thus also a powerful number.

420911595729 is a `hidden beast` number, since 4 + 2 + 0 + 9 + 11 + 59 + 572 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 420911595729 - 2¹⁵ = 420911562961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420911595719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1838202 + ... + 2054460.

Almost surely, 2^420911595729 is an apocalyptic number.

420911595729 is the 648777-th square number.

420911595729 is the 324389-th centered octagonal number.

It is an amenable number.

420911595729 is a deficient number, since it is larger than the sum of its proper divisors (187074631704).

420911595729 is an frugal number, since it uses more digits than its factorization.

420911595729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432524 (or 216262 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 54.

The spelling of 420911595729 in words is "four hundred twenty billion, nine hundred eleven million, five hundred ninety-five thousand, seven hundred twenty-nine".