75451718489 has 4 divisors (see below), whose sum is σ = 86230535424. Its totient is φ = 64672901556.

The previous prime is 75451718479. The next prime is 75451718491. The reversal of 75451718489 is 98481715457.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 75451718489 - 2⁸ = 75451718233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75451718479) 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, 5389408457 + ... + 5389408470.

It is an arithmetic number, because the mean of its divisors is an integer number (21557633856).

Almost surely, 2^75451718489 is an apocalyptic number.

It is an amenable number.

75451718489 is a deficient number, since it is larger than the sum of its proper divisors (10778816935).

75451718489 is a wasteful number, since it uses less digits than its factorization.

75451718489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10778816934.

The product of its digits is 11289600, while the sum is 59.

The spelling of 75451718489 in words is "seventy-five billion, four hundred fifty-one million, seven hundred eighteen thousand, four hundred eighty-nine".