75406055 has 4 divisors (see below), whose sum is σ = 90487272. Its totient is φ = 60324840.

The previous prime is 75406049. The next prime is 75406057. The reversal of 75406055 is 55060457.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-75406055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75406057) 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 3 ways as a sum of consecutive naturals, for example, 7540601 + ... + 7540610.

It is an arithmetic number, because the mean of its divisors is an integer number (22621818).

Almost surely, 2^75406055 is an apocalyptic number.

75406055 is a deficient number, since it is larger than the sum of its proper divisors (15081217).

75406055 is a wasteful number, since it uses less digits than its factorization.

75406055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15081216.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 75406055 is about 8683.6659885097. The cubic root of 75406055 is about 422.4760300583.

The spelling of 75406055 in words is "seventy-five million, four hundred six thousand, fifty-five".