75681727531 has 4 divisors (see below), whose sum is σ = 75688905600. Its totient is φ = 75674549464.

The previous prime is 75681727463. The next prime is 75681727543. The reversal of 75681727531 is 13572718657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13572718657 = 21881 ⋅620297.

It is a cyclic number.

It is not a de Polignac number, because 75681727531 - 2⁹ = 75681727019 is a prime.

It is a super-2 number, since 2×75681727531² (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 (75681727591) 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, 3573196 + ... + 3594313.

It is an arithmetic number, because the mean of its divisors is an integer number (18922226400).

Almost surely, 2^75681727531 is an apocalyptic number.

75681727531 is a deficient number, since it is larger than the sum of its proper divisors (7178069).

75681727531 is a wasteful number, since it uses less digits than its factorization.

75681727531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7178068.

The product of its digits is 2469600, while the sum is 52.

The spelling of 75681727531 in words is "seventy-five billion, six hundred eighty-one million, seven hundred twenty-seven thousand, five hundred thirty-one".