33129745872 has 20 divisors (see below), whose sum is σ = 85585176960. Its totient is φ = 11043248608.

The previous prime is 33129745871. The next prime is 33129745927. The reversal of 33129745872 is 27854792133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33129745871) 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, 345101472 + ... + 345101567.

It is an arithmetic number, because the mean of its divisors is an integer number (4279258848).

Almost surely, 2^33129745872 is an apocalyptic number.

It is an amenable number.

33129745872 is an abundant number, since it is smaller than the sum of its proper divisors (52455431088).

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

33129745872 is a wasteful number, since it uses less digits than its factorization.

33129745872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690203050 (or 690203044 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The spelling of 33129745872 in words is "thirty-three billion, one hundred twenty-nine million, seven hundred forty-five thousand, eight hundred seventy-two".