43778239056 has 60 divisors (see below), whose sum is σ = 122603173108. Its totient is φ = 14582633472.

The previous prime is 43778239019. The next prime is 43778239067. The reversal of 43778239056 is 65093287734.

43778239056 is a `hidden beast` number, since 437 + 78 + 2 + 3 + 90 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33629691456 + 10148547600 = 183384^2 + 100740^2 .

It is a super-2 number, since 2×43778239056² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43778238993 and 43778239011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104616 + ... + 313848.

Almost surely, 2^43778239056 is an apocalyptic number.

It is a pronic number, being equal to 209232×209233.

It is an amenable number.

43778239056 is an abundant number, since it is smaller than the sum of its proper divisors (78824934052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43778239056 is a wasteful number, since it uses less digits than its factorization.

43778239056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210700 (or 210691 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 43778239056 in words is "forty-three billion, seven hundred seventy-eight million, two hundred thirty-nine thousand, fifty-six".