75117279745 has 8 divisors (see below), whose sum is σ = 91841504616. Its totient is φ = 58959977856.

The previous prime is 75117279737. The next prime is 75117279791. The reversal of 75117279745 is 54797271157.

It can be written as a sum of positive squares in 4 ways, for example, as 9974416384 + 65142863361 = 99872^2 + 255231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75117279745 - 2³ = 75117279737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141730452 + ... + 141730981.

It is an arithmetic number, because the mean of its divisors is an integer number (11480188077).

Almost surely, 2^75117279745 is an apocalyptic number.

It is an amenable number.

75117279745 is a deficient number, since it is larger than the sum of its proper divisors (16724224871).

75117279745 is a wasteful number, since it uses less digits than its factorization.

75117279745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283461491.

The product of its digits is 4321800, while the sum is 55.

The spelling of 75117279745 in words is "seventy-five billion, one hundred seventeen million, two hundred seventy-nine thousand, seven hundred forty-five".