616011561511 has 2 divisors, whose sum is σ = 616011561512. Its totient is φ = 616011561510.

The previous prime is 616011561463. The next prime is 616011561521. The reversal of 616011561511 is 115165110616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616011561511 - 2¹⁷ = 616011430439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616011561521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308005780755 + 308005780756.

It is an arithmetic number, because the mean of its divisors is an integer number (308005780756).

Almost surely, 2^616011561511 is an apocalyptic number.

616011561511 is a deficient number, since it is larger than the sum of its proper divisors (1).

616011561511 is an equidigital number, since it uses as much as digits as its factorization.

616011561511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 616011561511 in words is "six hundred sixteen billion, eleven million, five hundred sixty-one thousand, five hundred eleven".