611721123063 has 16 divisors (see below), whose sum is σ = 819975315456. Its totient is φ = 405640907360.

The previous prime is 611721123061. The next prime is 611721123151. The reversal of 611721123063 is 360321127116.

It is a cyclic number.

It is not a de Polignac number, because 611721123063 - 2¹ = 611721123061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611721123061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6913981 + ... + 7001897.

It is an arithmetic number, because the mean of its divisors is an integer number (51248457216).

Almost surely, 2^611721123063 is an apocalyptic number.

611721123063 is a deficient number, since it is larger than the sum of its proper divisors (208254192393).

611721123063 is a wasteful number, since it uses less digits than its factorization.

611721123063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100254.

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 611721123063 in words is "six hundred eleven billion, seven hundred twenty-one million, one hundred twenty-three thousand, sixty-three".