75172575745 has 32 divisors (see below), whose sum is σ = 95551488000. Its totient is φ = 56615555520.

The previous prime is 75172575721. The next prime is 75172575773. The reversal of 75172575745 is 54757527157.

It is a de Polignac number, because none of the positive numbers 2^k-75172575745 is a prime.

It is a super-2 number, since 2×75172575745² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26109216 + ... + 26112094.

It is an arithmetic number, because the mean of its divisors is an integer number (2985984000).

Almost surely, 2^75172575745 is an apocalyptic number.

It is an amenable number.

75172575745 is a deficient number, since it is larger than the sum of its proper divisors (20378912255).

75172575745 is a wasteful number, since it uses less digits than its factorization.

75172575745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533.

The product of its digits is 12005000, while the sum is 55.

The spelling of 75172575745 in words is "seventy-five billion, one hundred seventy-two million, five hundred seventy-five thousand, seven hundred forty-five".