616616531101 has 4 divisors (see below), whose sum is σ = 652888091772. Its totient is φ = 580344970432.

The previous prime is 616616531059. The next prime is 616616531107. The reversal of 616616531101 is 101135616616.

616616531101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196062984100 + 420553547001 = 442790^2 + 648501^2 .

It is a cyclic number.

It is not a de Polignac number, because 616616531101 - 2¹⁹ = 616616006813 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 (616616531107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18135780310 + ... + 18135780343.

It is an arithmetic number, because the mean of its divisors is an integer number (163222022943).

Almost surely, 2^616616531101 is an apocalyptic number.

It is an amenable number.

616616531101 is a deficient number, since it is larger than the sum of its proper divisors (36271560671).

616616531101 is a wasteful number, since it uses less digits than its factorization.

616616531101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36271560670.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 616616531101 in words is "six hundred sixteen billion, six hundred sixteen million, five hundred thirty-one thousand, one hundred one".