33390459638 has 4 divisors (see below), whose sum is σ = 50085689460. Its totient is φ = 16695229818.

The previous prime is 33390459637. The next prime is 33390459649. The reversal of 33390459638 is 83695409333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83695409333 = 139 ⋅602125247.

It is a super-2 number, since 2×33390459638² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33390459638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33390459637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8347614908 + ... + 8347614911.

It is an arithmetic number, because the mean of its divisors is an integer number (12521422365).

Almost surely, 2^33390459638 is an apocalyptic number.

33390459638 is a deficient number, since it is larger than the sum of its proper divisors (16695229822).

33390459638 is a wasteful number, since it uses less digits than its factorization.

33390459638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16695229821.

The product of its (nonzero) digits is 6298560, while the sum is 53.

The spelling of 33390459638 in words is "thirty-three billion, three hundred ninety million, four hundred fifty-nine thousand, six hundred thirty-eight".