621205004542 has 8 divisors (see below), whose sum is σ = 931831696296. Its totient is φ = 310594439112.

The previous prime is 621205004471. The next prime is 621205004557. The reversal of 621205004542 is 245400502126.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3934813 + ... + 4089640.

It is an arithmetic number, because the mean of its divisors is an integer number (116478962037).

Almost surely, 2^621205004542 is an apocalyptic number.

621205004542 is a deficient number, since it is larger than the sum of its proper divisors (310626691754).

621205004542 is a wasteful number, since it uses less digits than its factorization.

621205004542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8063162.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 621205004542 its reverse (245400502126), we get a palindrome (866605506668).

The spelling of 621205004542 in words is "six hundred twenty-one billion, two hundred five million, four thousand, five hundred forty-two".