616737658961 has 8 divisors (see below), whose sum is σ = 620178721344. Its totient is φ = 613296966960.

The previous prime is 616737658939. The next prime is 616737658967. The reversal of 616737658961 is 169856737616.

616737658961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616737658961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616737658967) 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, 3672350 + ... + 3836616.

It is an arithmetic number, because the mean of its divisors is an integer number (77522340168).

Almost surely, 2^616737658961 is an apocalyptic number.

It is an amenable number.

616737658961 is a deficient number, since it is larger than the sum of its proper divisors (3441062383).

616737658961 is a wasteful number, since it uses less digits than its factorization.

616737658961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185191.

The product of its digits is 68584320, while the sum is 65.

The spelling of 616737658961 in words is "six hundred sixteen billion, seven hundred thirty-seven million, six hundred fifty-eight thousand, nine hundred sixty-one".