33639838540 has 48 divisors (see below), whose sum is σ = 88075217664. Its totient is φ = 10485144000.

The previous prime is 33639838537. The next prime is 33639838541. The reversal of 33639838540 is 4583893633.

It is a super-2 number, since 2×33639838540² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33639838541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10920486 + ... + 10923565.

It is an arithmetic number, because the mean of its divisors is an integer number (1834900368).

Almost surely, 2^33639838540 is an apocalyptic number.

It is an amenable number.

33639838540 is an abundant number, since it is smaller than the sum of its proper divisors (54435379124).

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

33639838540 is a wasteful number, since it uses less digits than its factorization.

33639838540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21844078 (or 21844076 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 33639838540 in words is "thirty-three billion, six hundred thirty-nine million, eight hundred thirty-eight thousand, five hundred forty".