420553500761 has 4 divisors (see below), whose sum is σ = 420562152912. Its totient is φ = 420544848612.

The previous prime is 420553500733. The next prime is 420553500799. The reversal of 420553500761 is 167005355024.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-420553500761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420553500721) 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, 4252751 + ... + 4350516.

It is an arithmetic number, because the mean of its divisors is an integer number (105140538228).

Almost surely, 2^420553500761 is an apocalyptic number.

It is an amenable number.

420553500761 is a deficient number, since it is larger than the sum of its proper divisors (8652151).

420553500761 is an equidigital number, since it uses as much as digits as its factorization.

420553500761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8652150.

The product of its (nonzero) digits is 126000, while the sum is 38.

Adding to 420553500761 its reverse (167005355024), we get a palindrome (587558855785).

The spelling of 420553500761 in words is "four hundred twenty billion, five hundred fifty-three million, five hundred thousand, seven hundred sixty-one".