71236752537 has 4 divisors (see below), whose sum is σ = 94982336720. Its totient is φ = 47491168356.

The previous prime is 71236752533. The next prime is 71236752593. The reversal of 71236752537 is 73525763217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 71236752537 - 2² = 71236752533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71236752533) 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, 11872792087 + ... + 11872792092.

It is an arithmetic number, because the mean of its divisors is an integer number (23745584180).

Almost surely, 2^71236752537 is an apocalyptic number.

It is an amenable number.

71236752537 is a deficient number, since it is larger than the sum of its proper divisors (23745584183).

71236752537 is a wasteful number, since it uses less digits than its factorization.

71236752537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23745584182.

The product of its digits is 1852200, while the sum is 48.

The spelling of 71236752537 in words is "seventy-one billion, two hundred thirty-six million, seven hundred fifty-two thousand, five hundred thirty-seven".