71252262761 has 4 divisors (see below), whose sum is σ = 71613949572. Its totient is φ = 70890575952.

The previous prime is 71252262743. The next prime is 71252262769. The reversal of 71252262761 is 16726225217.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34916659600 + 36335603161 = 186860^2 + 190619^2 .

It is a cyclic number.

It is not a de Polignac number, because 71252262761 - 2³⁴ = 54072393577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71252262769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180843110 + ... + 180843503.

It is an arithmetic number, because the mean of its divisors is an integer number (17903487393).

Almost surely, 2^71252262761 is an apocalyptic number.

It is an amenable number.

71252262761 is a deficient number, since it is larger than the sum of its proper divisors (361686811).

71252262761 is a wasteful number, since it uses less digits than its factorization.

71252262761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361686810.

The product of its digits is 141120, while the sum is 41.

Adding to 71252262761 its reverse (16726225217), we get a palindrome (87978487978).

The spelling of 71252262761 in words is "seventy-one billion, two hundred fifty-two million, two hundred sixty-two thousand, seven hundred sixty-one".