61543064727 has 6 divisors (see below), whose sum is σ = 88895537952. Its totient is φ = 41028709812.

The previous prime is 61543064707. The next prime is 61543064767. The reversal of 61543064727 is 72746034516.

61543064727 is a `hidden beast` number, since 61 + 543 + 0 + 6 + 47 + 2 + 7 = 666.

It is not a de Polignac number, because 61543064727 - 2¹⁹ = 61542540439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61543064707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3419059143 + ... + 3419059160.

It is an arithmetic number, because the mean of its divisors is an integer number (14815922992).

Almost surely, 2^61543064727 is an apocalyptic number.

61543064727 is a deficient number, since it is larger than the sum of its proper divisors (27352473225).

61543064727 is a wasteful number, since it uses less digits than its factorization.

61543064727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838118309 (or 6838118306 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 61543064727 in words is "sixty-one billion, five hundred forty-three million, sixty-four thousand, seven hundred twenty-seven".