612172603526221 has 8 divisors (see below), whose sum is σ = 612220609342944. Its totient is φ = 612124599360720.

The previous prime is 612172603526219. The next prime is 612172603526227. The reversal of 612172603526221 is 122625306271216.

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 612172603526221 - 2¹ = 612172603526219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612172603526227) 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, 801089406 + ... + 801853216.

It is an arithmetic number, because the mean of its divisors is an integer number (76527576167868).

Almost surely, 2^{612172603526221} is an apocalyptic number.

It is an amenable number.

612172603526221 is a deficient number, since it is larger than the sum of its proper divisors (48005816723).

612172603526221 is a wasteful number, since it uses less digits than its factorization.

612172603526221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825611.

The product of its (nonzero) digits is 725760, while the sum is 46.

Adding to 612172603526221 its reverse (122625306271216), we get a palindrome (734797909797437).

The spelling of 612172603526221 in words is "six hundred twelve trillion, one hundred seventy-two billion, six hundred three million, five hundred twenty-six thousand, two hundred twenty-one".