38649042433 has 4 divisors (see below), whose sum is σ = 38788569940. Its totient is φ = 38509514928.

The previous prime is 38649042431. The next prime is 38649042449. The reversal of 38649042433 is 33424094683.

38649042433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14310858384 + 24338184049 = 119628^2 + 156007^2 .

It is a cyclic number.

It is not a de Polignac number, because 38649042433 - 2¹ = 38649042431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38649042431) 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, 69763338 + ... + 69763891.

It is an arithmetic number, because the mean of its divisors is an integer number (9697142485).

Almost surely, 2^38649042433 is an apocalyptic number.

It is an amenable number.

38649042433 is a deficient number, since it is larger than the sum of its proper divisors (139527507).

38649042433 is a wasteful number, since it uses less digits than its factorization.

38649042433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139527506.

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 38649042433 in words is "thirty-eight billion, six hundred forty-nine million, forty-two thousand, four hundred thirty-three".