75212240565 has 144 divisors (see below), whose sum is σ = 162924302016. Its totient is φ = 29417794560.

The previous prime is 75212240561. The next prime is 75212240699. The reversal of 75212240565 is 56504221257.

It is not a de Polignac number, because 75212240565 - 2² = 75212240561 is a prime.

It is a super-2 number, since 2×75212240565² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75212240561) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1487022 + ... + 1536768.

It is an arithmetic number, because the mean of its divisors is an integer number (1131418764).

Almost surely, 2^75212240565 is an apocalyptic number.

It is an amenable number.

75212240565 is an abundant number, since it is smaller than the sum of its proper divisors (87712061451).

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

75212240565 is a wasteful number, since it uses less digits than its factorization.

75212240565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49808 (or 49790 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 39.

The spelling of 75212240565 in words is "seventy-five billion, two hundred twelve million, two hundred forty thousand, five hundred sixty-five".