61165601543 has 2 divisors, whose sum is σ = 61165601544. Its totient is φ = 61165601542.

The previous prime is 61165601533. The next prime is 61165601573. The reversal of 61165601543 is 34510656116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61165601543 - 2⁶ = 61165601479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61165601497 and 61165601506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61165601533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30582800771 + 30582800772.

It is an arithmetic number, because the mean of its divisors is an integer number (30582800772).

Almost surely, 2^61165601543 is an apocalyptic number.

61165601543 is a deficient number, since it is larger than the sum of its proper divisors (1).

61165601543 is an equidigital number, since it uses as much as digits as its factorization.

61165601543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 61165601543 in words is "sixty-one billion, one hundred sixty-five million, six hundred one thousand, five hundred forty-three".