43478133373781 has 4 divisors (see below), whose sum is σ = 45368486998752. Its totient is φ = 41587779748812.

The previous prime is 43478133373691. The next prime is 43478133373789. The reversal of 43478133373781 is 18737333187434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43478133373781 is a prime.

It is a super-2 number, since 2×43478133373781² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43478133373789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945176812451 + ... + 945176812496.

It is an arithmetic number, because the mean of its divisors is an integer number (11342121749688).

Almost surely, 2^{43478133373781} is an apocalyptic number.

It is an amenable number.

43478133373781 is a deficient number, since it is larger than the sum of its proper divisors (1890353624971).

43478133373781 is a wasteful number, since it uses less digits than its factorization.

43478133373781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890353624970.

The product of its digits is 85349376, while the sum is 62.

The spelling of 43478133373781 in words is "forty-three trillion, four hundred seventy-eight billion, one hundred thirty-three million, three hundred seventy-three thousand, seven hundred eighty-one".