75018337421 has 12 divisors (see below), whose sum is σ = 77227297812. Its totient is φ = 72870928128.

The previous prime is 75018337411. The next prime is 75018337447. The reversal of 75018337421 is 12473381057.

It can be written as a sum of positive squares in 6 ways, for example, as 887384521 + 74130952900 = 29789^2 + 272270^2 .

It is a de Polignac number, because none of the positive numbers 2^k-75018337421 is a prime.

It is a super-2 number, since 2×75018337421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75018337411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 794501 + ... + 883893.

It is an arithmetic number, because the mean of its divisors is an integer number (6435608151).

Almost surely, 2^75018337421 is an apocalyptic number.

It is an amenable number.

75018337421 is a deficient number, since it is larger than the sum of its proper divisors (2208960391).

75018337421 is an equidigital number, since it uses as much as digits as its factorization.

75018337421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90080 (or 90043 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 75018337421 in words is "seventy-five billion, eighteen million, three hundred thirty-seven thousand, four hundred twenty-one".