75727447387 has 4 divisors (see below), whose sum is σ = 75732915960. Its totient is φ = 75721978816.

The previous prime is 75727447349. The next prime is 75727447391. The reversal of 75727447387 is 78374472757.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78374472757 = 7 ⋅11196353251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75727447387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75727447487) 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, 2713462 + ... + 2741227.

It is an arithmetic number, because the mean of its divisors is an integer number (18933228990).

Almost surely, 2^75727447387 is an apocalyptic number.

75727447387 is a deficient number, since it is larger than the sum of its proper divisors (5468573).

75727447387 is a wasteful number, since it uses less digits than its factorization.

75727447387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468572.

The product of its digits is 64538880, while the sum is 61.

The spelling of 75727447387 in words is "seventy-five billion, seven hundred twenty-seven million, four hundred forty-seven thousand, three hundred eighty-seven".