75672857569 has 3 divisors (see below), whose sum is σ = 75673132657. Its totient is φ = 75672582482.

The previous prime is 75672857509. The next prime is 75672857591. The reversal of 75672857569 is 96575827657.

The square root of 75672857569 is 275087.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 75672857569 - 2³¹ = 73525373921 is a prime.

It is a super-2 number, since 2×75672857569² (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 (75672857509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 137544 + ... + 412630.

Almost surely, 2^75672857569 is an apocalyptic number.

75672857569 is the 275087-th square number.

75672857569 is the 137544-th centered octagonal number.

It is an amenable number.

75672857569 is a deficient number, since it is larger than the sum of its proper divisors (275088).

75672857569 is an frugal number, since it uses more digits than its factorization.

75672857569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550174 (or 275087 counting only the distinct ones).

The product of its digits is 222264000, while the sum is 67.

The spelling of 75672857569 in words is "seventy-five billion, six hundred seventy-two million, eight hundred fifty-seven thousand, five hundred sixty-nine".