42447036881 has 8 divisors (see below), whose sum is σ = 43628440680. Its totient is φ = 41267432448.

The previous prime is 42447036829. The next prime is 42447036949. The reversal of 42447036881 is 18863074424.

It can be written as a sum of positive squares in 4 ways, for example, as 20032156225 + 22414880656 = 141535^2 + 149716^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42447036881 - 2⁶ = 42447036817 is a prime.

It is a super-2 number, since 2×42447036881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42447036581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401936 + ... + 496433.

It is an arithmetic number, because the mean of its divisors is an integer number (5453555085).

Almost surely, 2^42447036881 is an apocalyptic number.

It is an amenable number.

42447036881 is a deficient number, since it is larger than the sum of its proper divisors (1181403799).

42447036881 is a wasteful number, since it uses less digits than its factorization.

42447036881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899683.

The product of its (nonzero) digits is 1032192, while the sum is 47.

The spelling of 42447036881 in words is "forty-two billion, four hundred forty-seven million, thirty-six thousand, eight hundred eighty-one".