616400660623 has 16 divisors (see below), whose sum is σ = 674648432640. Its totient is φ = 558522518400.

The previous prime is 616400660621. The next prime is 616400660663. The reversal of 616400660623 is 326066004616.

616400660623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 616400660623 - 2¹ = 616400660621 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 (616400660621) 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, 12323058 + ... + 12372976.

It is an arithmetic number, because the mean of its divisors is an integer number (42165527040).

Almost surely, 2^616400660623 is an apocalyptic number.

616400660623 is a deficient number, since it is larger than the sum of its proper divisors (58247772017).

616400660623 is a wasteful number, since it uses less digits than its factorization.

616400660623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53598.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 616400660623 in words is "six hundred sixteen billion, four hundred million, six hundred sixty thousand, six hundred twenty-three".