33999061992 has 384 divisors, whose sum is σ = 106104816000. Its totient is φ = 9036195840.

The previous prime is 33999061981. The next prime is 33999061997. The reversal of 33999061992 is 29916099933.

It is a happy number.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (33999061997) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 122740158 + ... + 122740434.

It is an arithmetic number, because the mean of its divisors is an integer number (276314625).

Almost surely, 2^33999061992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33999061992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53052408000).

33999061992 is an abundant number, since it is smaller than the sum of its proper divisors (72105754008).

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

33999061992 is a wasteful number, since it uses less digits than its factorization.

33999061992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 6377292, while the sum is 60.

The spelling of 33999061992 in words is "thirty-three billion, nine hundred ninety-nine million, sixty-one thousand, nine hundred ninety-two".