611516510977 has 2 divisors, whose sum is σ = 611516510978. Its totient is φ = 611516510976.

The previous prime is 611516510959. The next prime is 611516511019. The reversal of 611516510977 is 779015615116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334620599296 + 276895911681 = 578464^2 + 526209^2 .

It is a cyclic number.

It is not a de Polignac number, because 611516510977 - 2⁷ = 611516510849 is a prime.

It is a super-2 number, since 2×611516510977² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 611516510977.

It is not a weakly prime, because it can be changed into another prime (611513510977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305758255488 + 305758255489.

It is an arithmetic number, because the mean of its divisors is an integer number (305758255489).

Almost surely, 2^611516510977 is an apocalyptic number.

It is an amenable number.

611516510977 is a deficient number, since it is larger than the sum of its proper divisors (1).

611516510977 is an equidigital number, since it uses as much as digits as its factorization.

611516510977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 396900, while the sum is 49.

The spelling of 611516510977 in words is "six hundred eleven billion, five hundred sixteen million, five hundred ten thousand, nine hundred seventy-seven".