43209872265 has 16 divisors (see below), whose sum is σ = 79012338048. Its totient is φ = 19753084416.

The previous prime is 43209872249. The next prime is 43209872273. The reversal of 43209872265 is 56227890234.

It is not a de Polignac number, because 43209872265 - 2⁴ = 43209872249 is a prime.

It is a super-2 number, since 2×43209872265² (a number of 22 digits) contains 22 as substring.

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, 205761192 + ... + 205761401.

It is an arithmetic number, because the mean of its divisors is an integer number (4938271128).

Almost surely, 2^43209872265 is an apocalyptic number.

It is an amenable number.

43209872265 is a deficient number, since it is larger than the sum of its proper divisors (35802465783).

43209872265 is a wasteful number, since it uses less digits than its factorization.

43209872265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411522608.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 43209872265 in words is "forty-three billion, two hundred nine million, eight hundred seventy-two thousand, two hundred sixty-five".