621132412216 has 8 divisors (see below), whose sum is σ = 1164623272920. Its totient is φ = 310566206104.

The previous prime is 621132412181. The next prime is 621132412231. The reversal of 621132412216 is 612214231126.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 38820775756 + ... + 38820775771.

It is an arithmetic number, because the mean of its divisors is an integer number (145577909115).

Almost surely, 2^621132412216 is an apocalyptic number.

It is an amenable number.

621132412216 is a deficient number, since it is larger than the sum of its proper divisors (543490860704).

621132412216 is a wasteful number, since it uses less digits than its factorization.

621132412216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77641551533 (or 77641551529 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

It can be divided in two parts, 62113 and 2412216, that added together give a square (2474329 = 1573²).

The spelling of 621132412216 in words is "six hundred twenty-one billion, one hundred thirty-two million, four hundred twelve thousand, two hundred sixteen".