616481764061 has 2 divisors, whose sum is σ = 616481764062. Its totient is φ = 616481764060.

The previous prime is 616481764051. The next prime is 616481764069. The reversal of 616481764061 is 160467184616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458450868100 + 158030895961 = 677090^2 + 397531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616481764061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616481764069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308240882030 + 308240882031.

It is an arithmetic number, because the mean of its divisors is an integer number (308240882031).

Almost surely, 2^616481764061 is an apocalyptic number.

It is an amenable number.

616481764061 is a deficient number, since it is larger than the sum of its proper divisors (1).

616481764061 is an equidigital number, since it uses as much as digits as its factorization.

616481764061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 616481764061 in words is "six hundred sixteen billion, four hundred eighty-one million, seven hundred sixty-four thousand, sixty-one".