612444506538 has 8 divisors (see below), whose sum is σ = 1224889013088. Its totient is φ = 204148168844.

The previous prime is 612444506521. The next prime is 612444506539. The reversal of 612444506538 is 835605444216.

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

612444506538 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (612444506539) by changing a digit.

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, 51037042206 + ... + 51037042217.

It is an arithmetic number, because the mean of its divisors is an integer number (153111126636).

Almost surely, 2^612444506538 is an apocalyptic number.

612444506538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612444506538 is a wasteful number, since it uses less digits than its factorization.

612444506538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102074084428.

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 612444506538 in words is "six hundred twelve billion, four hundred forty-four million, five hundred six thousand, five hundred thirty-eight".