75138765 has 16 divisors (see below), whose sum is σ = 129470208. Its totient is φ = 36991296.

The previous prime is 75138757. The next prime is 75138779. The reversal of 75138765 is 56783157.

It is not a de Polignac number, because 75138765 - 2³ = 75138757 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192469 + ... + 192858.

It is an arithmetic number, because the mean of its divisors is an integer number (8091888).

Almost surely, 2^75138765 is an apocalyptic number.

It is an amenable number.

75138765 is a deficient number, since it is larger than the sum of its proper divisors (54331443).

75138765 is a wasteful number, since it uses less digits than its factorization.

75138765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385348.

The product of its digits is 176400, while the sum is 42.

The square root of 75138765 is about 8668.2619365130. The cubic root of 75138765 is about 421.9762589311.

The spelling of 75138765 in words is "seventy-five million, one hundred thirty-eight thousand, seven hundred sixty-five".