43745420709 has 64 divisors (see below), whose sum is σ = 66953779200. Its totient is φ = 28218098304.

The previous prime is 43745420701. The next prime is 43745420711. The reversal of 43745420709 is 90702454734.

43745420709 is a `hidden beast` number, since 4 + 37 + 4 + 542 + 0 + 70 + 9 = 666.

It is not a de Polignac number, because 43745420709 - 2³ = 43745420701 is a prime.

It is a super-4 number, since 4×43745420709⁴ (a number of 44 digits) contains 4444 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 (43745420701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26886354 + ... + 26887980.

It is an arithmetic number, because the mean of its divisors is an integer number (1046152800).

Almost surely, 2^43745420709 is an apocalyptic number.

It is an amenable number.

43745420709 is a deficient number, since it is larger than the sum of its proper divisors (23208358491).

43745420709 is a wasteful number, since it uses less digits than its factorization.

43745420709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959 (or 1953 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 43745420709 in words is "forty-three billion, seven hundred forty-five million, four hundred twenty thousand, seven hundred nine".