71499789505 has 8 divisors (see below), whose sum is σ = 87892424424. Its totient is φ = 55804713600.

The previous prime is 71499789457. The next prime is 71499789509. The reversal of 71499789505 is 50598799417.

It can be written as a sum of positive squares in 4 ways, for example, as 7290256689 + 64209532816 = 85383^2 + 253396^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71499789505 - 2²⁷ = 71365571777 is a prime.

It is a super-2 number, since 2×71499789505² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71499789509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174389526 + ... + 174389935.

It is an arithmetic number, because the mean of its divisors is an integer number (10986553053).

Almost surely, 2^71499789505 is an apocalyptic number.

It is an amenable number.

71499789505 is a deficient number, since it is larger than the sum of its proper divisors (16392634919).

71499789505 is a wasteful number, since it uses less digits than its factorization.

71499789505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348779507.

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 71499789505 in words is "seventy-one billion, four hundred ninety-nine million, seven hundred eighty-nine thousand, five hundred five".