616377987077 has 2 divisors, whose sum is σ = 616377987078. Its totient is φ = 616377987076.

The previous prime is 616377987061. The next prime is 616377987089. The reversal of 616377987077 is 770789773616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334325647681 + 282052339396 = 578209^2 + 531086^2 .

It is a cyclic number.

It is not a de Polignac number, because 616377987077 - 2⁴ = 616377987061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616377986998 and 616377987016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616377987007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308188993538 + 308188993539.

It is an arithmetic number, because the mean of its divisors is an integer number (308188993539).

Almost surely, 2^616377987077 is an apocalyptic number.

It is an amenable number.

616377987077 is a deficient number, since it is larger than the sum of its proper divisors (1).

616377987077 is an equidigital number, since it uses as much as digits as its factorization.

616377987077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130691232, while the sum is 68.

The spelling of 616377987077 in words is "six hundred sixteen billion, three hundred seventy-seven million, nine hundred eighty-seven thousand, seventy-seven".