75321431547442 has 16 divisors (see below), whose sum is σ = 118965963484800. Its totient is φ = 35667356631120.

The previous prime is 75321431547437. The next prime is 75321431547469. The reversal of 75321431547442 is 24474513412357.

It is a self number, because there is not a number n which added to its sum of digits gives 75321431547442.

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, 311438842 + ... + 311680597.

It is an arithmetic number, because the mean of its divisors is an integer number (7435372717800).

Almost surely, 2^{75321431547442} is an apocalyptic number.

75321431547442 is a deficient number, since it is larger than the sum of its proper divisors (43644531937358).

75321431547442 is a wasteful number, since it uses less digits than its factorization.

75321431547442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623122641.

The product of its digits is 11289600, while the sum is 52.

Adding to 75321431547442 its reverse (24474513412357), we get a palindrome (99795944959799).

The spelling of 75321431547442 in words is "seventy-five trillion, three hundred twenty-one billion, four hundred thirty-one million, five hundred forty-seven thousand, four hundred forty-two".