71585548730 has 32 divisors (see below), whose sum is σ = 129186141840. Its totient is φ = 28560499200.

The previous prime is 71585548717. The next prime is 71585548733. The reversal of 71585548730 is 3784558517.

It can be written as a sum of positive squares in 8 ways, for example, as 68941429489 + 2644119241 = 262567^2 + 51421^2 .

It is a super-2 number, since 2×71585548730² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (71585548733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7429556 + ... + 7439184.

Almost surely, 2^71585548730 is an apocalyptic number.

71585548730 is a deficient number, since it is larger than the sum of its proper divisors (57600593110).

71585548730 is a wasteful number, since it uses less digits than its factorization.

71585548730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11474.

The product of its (nonzero) digits is 4704000, while the sum is 53.

The spelling of 71585548730 in words is "seventy-one billion, five hundred eighty-five million, five hundred forty-eight thousand, seven hundred thirty".