75133640 has 32 divisors (see below), whose sum is σ = 176402880. Its totient is φ = 28746432.

The previous prime is 75133637. The next prime is 75133651. The reversal of 75133640 is 4633157.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39914 + ... + 41753.

It is an arithmetic number, because the mean of its divisors is an integer number (5512590).

Almost surely, 2^75133640 is an apocalyptic number.

It is an amenable number.

75133640 is an abundant number, since it is smaller than the sum of its proper divisors (101269240).

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

75133640 is a wasteful number, since it uses less digits than its factorization.

75133640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81701 (or 81697 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 75133640 is about 8667.9663128095. The cubic root of 75133640 is about 421.9666647822.

Adding to 75133640 its reverse (4633157), we get a palindrome (79766797).

The spelling of 75133640 in words is "seventy-five million, one hundred thirty-three thousand, six hundred forty".