616857444681 has 16 divisors (see below), whose sum is σ = 866985998400. Its totient is φ = 389044651968.

The previous prime is 616857444661. The next prime is 616857444703. The reversal of 616857444681 is 186444758616.

616857444681 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 616857444681 - 2¹⁸ = 616857182537 is a prime.

It is a super-2 number, since 2×616857444681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (616857444661) 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, 7591506 + ... + 7672331.

It is an arithmetic number, because the mean of its divisors is an integer number (54186624900).

Almost surely, 2^616857444681 is an apocalyptic number.

It is an amenable number.

616857444681 is a deficient number, since it is larger than the sum of its proper divisors (250128553719).

616857444681 is a wasteful number, since it uses less digits than its factorization.

616857444681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15264568.

The product of its digits is 30965760, while the sum is 60.

The spelling of 616857444681 in words is "six hundred sixteen billion, eight hundred fifty-seven million, four hundred forty-four thousand, six hundred eighty-one".