61077381191 has 2 divisors, whose sum is σ = 61077381192. Its totient is φ = 61077381190.

The previous prime is 61077381151. The next prime is 61077381251. The reversal of 61077381191 is 19118377016.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61077381191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61077381151) 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, 30538690595 + 30538690596.

It is an arithmetic number, because the mean of its divisors is an integer number (30538690596).

Almost surely, 2^61077381191 is an apocalyptic number.

61077381191 is a deficient number, since it is larger than the sum of its proper divisors (1).

61077381191 is an equidigital number, since it uses as much as digits as its factorization.

61077381191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 44.

The spelling of 61077381191 in words is "sixty-one billion, seventy-seven million, three hundred eighty-one thousand, one hundred ninety-one".