61860443543687 has 2 divisors, whose sum is σ = 61860443543688. Its totient is φ = 61860443543686.

The previous prime is 61860443543659. The next prime is 61860443543707. The reversal of 61860443543687 is 78634534406816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61860443543687 - 2¹⁰ = 61860443542663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61860443543627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30930221771843 + 30930221771844.

It is an arithmetic number, because the mean of its divisors is an integer number (30930221771844).

Almost surely, 2^{61860443543687} is an apocalyptic number.

61860443543687 is a deficient number, since it is larger than the sum of its proper divisors (1).

61860443543687 is an equidigital number, since it uses as much as digits as its factorization.

61860443543687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 278691840, while the sum is 65.

The spelling of 61860443543687 in words is "sixty-one trillion, eight hundred sixty billion, four hundred forty-three million, five hundred forty-three thousand, six hundred eighty-seven".