43625138860645 has 4 divisors (see below), whose sum is σ = 52350166632780. Its totient is φ = 34900111088512.

The previous prime is 43625138860613. The next prime is 43625138860651. The reversal of 43625138860645 is 54606883152634.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5058977113089 + 38566161747556 = 2249217^2 + 6210166^2 .

It is a cyclic number.

It is not a de Polignac number, because 43625138860645 - 2⁵ = 43625138860613 is a prime.

It is a super-2 number, since 2×43625138860645² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4362513886060 + ... + 4362513886069.

It is an arithmetic number, because the mean of its divisors is an integer number (13087541658195).

Almost surely, 2^{43625138860645} is an apocalyptic number.

It is an amenable number.

43625138860645 is a deficient number, since it is larger than the sum of its proper divisors (8725027772135).

43625138860645 is an equidigital number, since it uses as much as digits as its factorization.

43625138860645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8725027772134.

The product of its (nonzero) digits is 99532800, while the sum is 61.

The spelling of 43625138860645 in words is "forty-three trillion, six hundred twenty-five billion, one hundred thirty-eight million, eight hundred sixty thousand, six hundred forty-five".