71623863145 has 8 divisors (see below), whose sum is σ = 88271572104. Its totient is φ = 55750466304.

The previous prime is 71623863119. The next prime is 71623863163. The reversal of 71623863145 is 54136832617.

It can be written as a sum of positive squares in 4 ways, for example, as 31516190784 + 40107672361 = 177528^2 + 200269^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71623863145 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71623863095 and 71623863104.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 193577824 + ... + 193578193.

It is an arithmetic number, because the mean of its divisors is an integer number (11033946513).

Almost surely, 2^71623863145 is an apocalyptic number.

It is an amenable number.

71623863145 is a deficient number, since it is larger than the sum of its proper divisors (16647708959).

71623863145 is a wasteful number, since it uses less digits than its factorization.

71623863145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387156059.

The product of its digits is 725760, while the sum is 46.

The spelling of 71623863145 in words is "seventy-one billion, six hundred twenty-three million, eight hundred sixty-three thousand, one hundred forty-five".