71252324642 has 4 divisors (see below), whose sum is σ = 106878486966. Its totient is φ = 35626162320.

The previous prime is 71252324617. The next prime is 71252324683. The reversal of 71252324642 is 24642325217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24642325217 = 149 ⋅165384733.

It can be written as a sum of positive squares in only one way, i.e., 46165249321 + 25087075321 = 214861^2 + 158389^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71252324596 and 71252324605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17813081159 + ... + 17813081162.

Almost surely, 2^71252324642 is an apocalyptic number.

71252324642 is a deficient number, since it is larger than the sum of its proper divisors (35626162324).

71252324642 is a wasteful number, since it uses less digits than its factorization.

71252324642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35626162323.

The product of its digits is 161280, while the sum is 38.

Adding to 71252324642 its reverse (24642325217), we get a palindrome (95894649859).

The spelling of 71252324642 in words is "seventy-one billion, two hundred fifty-two million, three hundred twenty-four thousand, six hundred forty-two".