75321217857 has 16 divisors (see below), whose sum is σ = 104885895168. Its totient is φ = 47989141200.

The previous prime is 75321217771. The next prime is 75321217889. The reversal of 75321217857 is 75871212357.

It is a happy number.

It is not a de Polignac number, because 75321217857 - 2⁷ = 75321217729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75321257857) 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 15 ways as a sum of consecutive naturals, for example, 394783 + ... + 553620.

It is an arithmetic number, because the mean of its divisors is an integer number (6555368448).

Almost surely, 2^75321217857 is an apocalyptic number.

It is an amenable number.

75321217857 is a deficient number, since it is larger than the sum of its proper divisors (29564677311).

75321217857 is a wasteful number, since it uses less digits than its factorization.

75321217857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949580.

The product of its digits is 823200, while the sum is 48.

The spelling of 75321217857 in words is "seventy-five billion, three hundred twenty-one million, two hundred seventeen thousand, eight hundred fifty-seven".