61160142577991 has 2 divisors, whose sum is σ = 61160142577992. Its totient is φ = 61160142577990.

The previous prime is 61160142577931. The next prime is 61160142578033. The reversal of 61160142577991 is 19977524106116.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61160142577991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61160142577991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61160142577931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30580071288995 + 30580071288996.

It is an arithmetic number, because the mean of its divisors is an integer number (30580071288996).

Almost surely, 2^{61160142577991} is an apocalyptic number.

61160142577991 is a deficient number, since it is larger than the sum of its proper divisors (1).

61160142577991 is an equidigital number, since it uses as much as digits as its factorization.

61160142577991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 59.

The spelling of 61160142577991 in words is "sixty-one trillion, one hundred sixty billion, one hundred forty-two million, five hundred seventy-seven thousand, nine hundred ninety-one".