621234161603 has 8 divisors (see below), whose sum is σ = 681627395376. Its totient is φ = 561493828000.

The previous prime is 621234161557. The next prime is 621234161617. The reversal of 621234161603 is 306161432126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 621234161603 - 2¹² = 621234157507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621234161203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163223048 + ... + 163226853.

It is an arithmetic number, because the mean of its divisors is an integer number (85203424422).

Almost surely, 2^621234161603 is an apocalyptic number.

621234161603 is a deficient number, since it is larger than the sum of its proper divisors (60393233773).

621234161603 is a wasteful number, since it uses less digits than its factorization.

621234161603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326450085.

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 621234161603 its reverse (306161432126), we get a palindrome (927395593729).

The spelling of 621234161603 in words is "six hundred twenty-one billion, two hundred thirty-four million, one hundred sixty-one thousand, six hundred three".