616853901661 has 8 divisors (see below), whose sum is σ = 617130114048. Its totient is φ = 616577760000.

The previous prime is 616853901649. The next prime is 616853901683. The reversal of 616853901661 is 166109358616.

It is a happy number.

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 616853901661 - 2⁷ = 616853901533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616853901599 and 616853901608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616853901641) 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, 24205156 + ... + 24230626.

It is an arithmetic number, because the mean of its divisors is an integer number (77141264256).

Almost surely, 2^616853901661 is an apocalyptic number.

It is an amenable number.

616853901661 is a deficient number, since it is larger than the sum of its proper divisors (276212387).

616853901661 is a wasteful number, since it uses less digits than its factorization.

616853901661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35363.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 616853901661 in words is "six hundred sixteen billion, eight hundred fifty-three million, nine hundred one thousand, six hundred sixty-one".