61869471543 has 128 divisors (see below), whose sum is σ = 107539660800. Its totient is φ = 34740057600.

The previous prime is 61869471481. The next prime is 61869471551. The reversal of 61869471543 is 34517496816.

61869471543 is a `hidden beast` number, since 6 + 1 + 8 + 6 + 94 + 7 + 1 + 543 = 666.

It is not a de Polignac number, because 61869471543 - 2¹⁰ = 61869470519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61869471543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61869471743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 140932518 + ... + 140932956.

It is an arithmetic number, because the mean of its divisors is an integer number (840153600).

Almost surely, 2^61869471543 is an apocalyptic number.

61869471543 is a deficient number, since it is larger than the sum of its proper divisors (45670189257).

61869471543 is a wasteful number, since it uses less digits than its factorization.

61869471543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 844 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 61869471543 in words is "sixty-one billion, eight hundred sixty-nine million, four hundred seventy-one thousand, five hundred forty-three".