75577997538 has 56 divisors (see below), whose sum is σ = 172509868848. Its totient is φ = 24816623832.

The previous prime is 75577997533. The next prime is 75577997603. The reversal of 75577997538 is 83579977557.

It is a super-2 number, since 2×75577997538² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75577997533) 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 27 ways as a sum of consecutive naturals, for example, 289156 + ... + 484527.

Almost surely, 2^75577997538 is an apocalyptic number.

75577997538 is an abundant number, since it is smaller than the sum of its proper divisors (96931871310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75577997538 is an equidigital number, since it uses as much as digits as its factorization.

75577997538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773770 (or 773755 counting only the distinct ones).

The product of its digits is 583443000, while the sum is 72.

The spelling of 75577997538 in words is "seventy-five billion, five hundred seventy-seven million, nine hundred ninety-seven thousand, five hundred thirty-eight".