420801628381 has 4 divisors (see below), whose sum is σ = 420898882912. Its totient is φ = 420704373852.

The previous prime is 420801628361. The next prime is 420801628433. The reversal of 420801628381 is 183826108024.

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 not a de Polignac number, because 420801628381 - 2⁷ = 420801628253 is a prime.

It is a super-2 number, since 2×420801628381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420801628361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48620775 + ... + 48629428.

It is an arithmetic number, because the mean of its divisors is an integer number (105224720728).

Almost surely, 2^420801628381 is an apocalyptic number.

It is an amenable number.

420801628381 is a deficient number, since it is larger than the sum of its proper divisors (97254531).

420801628381 is an equidigital number, since it uses as much as digits as its factorization.

420801628381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97254530.

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 420801628381 in words is "four hundred twenty billion, eight hundred one million, six hundred twenty-eight thousand, three hundred eighty-one".