611111055977 has 2 divisors, whose sum is σ = 611111055978. Its totient is φ = 611111055976.

The previous prime is 611111055959. The next prime is 611111056007. The reversal of 611111055977 is 779550111116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 582014884201 + 29096171776 = 762899^2 + 170576^2 .

It is a cyclic number.

It is not a de Polignac number, because 611111055977 - 2¹⁴ = 611111039593 is a prime.

It is not a weakly prime, because it can be changed into another prime (611111055917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305555527988 + 305555527989.

It is an arithmetic number, because the mean of its divisors is an integer number (305555527989).

Almost surely, 2^611111055977 is an apocalyptic number.

It is an amenable number.

611111055977 is a deficient number, since it is larger than the sum of its proper divisors (1).

611111055977 is an equidigital number, since it uses as much as digits as its factorization.

611111055977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66150, while the sum is 44.

The spelling of 611111055977 in words is "six hundred eleven billion, one hundred eleven million, fifty-five thousand, nine hundred seventy-seven".