621413401601 has 4 divisors (see below), whose sum is σ = 630165703104. Its totient is φ = 612661100100.

The previous prime is 621413401597. The next prime is 621413401607. The reversal of 621413401601 is 106104314126.

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 621413401601 - 2² = 621413401597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621413401607) 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 3 ways as a sum of consecutive naturals, for example, 4376150645 + ... + 4376150786.

It is an arithmetic number, because the mean of its divisors is an integer number (157541425776).

Almost surely, 2^621413401601 is an apocalyptic number.

It is an amenable number.

621413401601 is a deficient number, since it is larger than the sum of its proper divisors (8752301503).

621413401601 is an equidigital number, since it uses as much as digits as its factorization.

621413401601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8752301502.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 621413401601 its reverse (106104314126), we get a palindrome (727517715727).

The spelling of 621413401601 in words is "six hundred twenty-one billion, four hundred thirteen million, four hundred one thousand, six hundred one".