611555055389 has 2 divisors, whose sum is σ = 611555055390. Its totient is φ = 611555055388.

The previous prime is 611555055373. The next prime is 611555055427. The reversal of 611555055389 is 983550555116.

611555055389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522194116900 + 89360938489 = 722630^2 + 298933^2 .

It is a cyclic number.

It is not a de Polignac number, because 611555055389 - 2⁴ = 611555055373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 611555055389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611555055989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305777527694 + 305777527695.

It is an arithmetic number, because the mean of its divisors is an integer number (305777527695).

Almost surely, 2^611555055389 is an apocalyptic number.

It is an amenable number.

611555055389 is a deficient number, since it is larger than the sum of its proper divisors (1).

611555055389 is an equidigital number, since it uses as much as digits as its factorization.

611555055389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050000, while the sum is 53.

The spelling of 611555055389 in words is "six hundred eleven billion, five hundred fifty-five million, fifty-five thousand, three hundred eighty-nine".