75472733647 has 4 divisors (see below), whose sum is σ = 75759702480. Its totient is φ = 75185764816.

The previous prime is 75472733629. The next prime is 75472733659. The reversal of 75472733647 is 74633727457.

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

It is a cyclic number.

It is not a de Polignac number, because 75472733647 - 2²³ = 75464345039 is a prime.

It is a super-2 number, since 2×75472733647² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75472733617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143484022 + ... + 143484547.

It is an arithmetic number, because the mean of its divisors is an integer number (18939925620).

Almost surely, 2^75472733647 is an apocalyptic number.

75472733647 is a deficient number, since it is larger than the sum of its proper divisors (286968833).

75472733647 is a wasteful number, since it uses less digits than its factorization.

75472733647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286968832.

The product of its digits is 20744640, while the sum is 55.

The spelling of 75472733647 in words is "seventy-five billion, four hundred seventy-two million, seven hundred thirty-three thousand, six hundred forty-seven".