71730705057 has 16 divisors (see below), whose sum is σ = 104340446400. Its totient is φ = 43471123200.

The previous prime is 71730705019. The next prime is 71730705077. The reversal of 71730705057 is 75050703717.

It is not a de Polignac number, because 71730705057 - 2⁶ = 71730704993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71730705077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975957 + ... + 1046877.

It is an arithmetic number, because the mean of its divisors is an integer number (6521277900).

Almost surely, 2^71730705057 is an apocalyptic number.

It is an amenable number.

71730705057 is a deficient number, since it is larger than the sum of its proper divisors (32609741343).

71730705057 is a wasteful number, since it uses less digits than its factorization.

71730705057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101584.

The product of its (nonzero) digits is 180075, while the sum is 42.

The spelling of 71730705057 in words is "seventy-one billion, seven hundred thirty million, seven hundred five thousand, fifty-seven".