43448193681 has 32 divisors (see below), whose sum is σ = 59808067200. Its totient is φ = 28038673920.

The previous prime is 43448193673. The next prime is 43448193787. The reversal of 43448193681 is 18639184434.

It is a happy number.

43448193681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43448193681 - 2³ = 43448193673 is a prime.

It is a super-2 number, since 2×43448193681² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43448093681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11204715 + ... + 11208591.

It is an arithmetic number, because the mean of its divisors is an integer number (1869002100).

Almost surely, 2^43448193681 is an apocalyptic number.

43448193681 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43448193681 is a deficient number, since it is larger than the sum of its proper divisors (16359873519).

43448193681 is a wasteful number, since it uses less digits than its factorization.

43448193681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609.

The product of its digits is 1990656, while the sum is 51.

The spelling of 43448193681 in words is "forty-three billion, four hundred forty-eight million, one hundred ninety-three thousand, six hundred eighty-one".