61005545510543 has 2 divisors, whose sum is σ = 61005545510544. Its totient is φ = 61005545510542.

The previous prime is 61005545510537. The next prime is 61005545510593. The reversal of 61005545510543 is 34501554550016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61005545510543 - 2³⁰ = 61004471768719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61005545510494 and 61005545510503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61005545510513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30502772755271 + 30502772755272.

It is an arithmetic number, because the mean of its divisors is an integer number (30502772755272).

Almost surely, 2^{61005545510543} is an apocalyptic number.

61005545510543 is a deficient number, since it is larger than the sum of its proper divisors (1).

61005545510543 is an equidigital number, since it uses as much as digits as its factorization.

61005545510543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900000, while the sum is 44.

The spelling of 61005545510543 in words is "sixty-one trillion, five billion, five hundred forty-five million, five hundred ten thousand, five hundred forty-three".