4034784255921 has 64 divisors (see below), whose sum is σ = 6153198992640. Its totient is φ = 2611116103680.

The previous prime is 4034784255883. The next prime is 4034784256007. The reversal of 4034784255921 is 1295524874304.

It is a happy number.

4034784255921 is a `hidden beast` number, since 4 + 0 + 3 + 4 + 7 + 8 + 42 + 5 + 592 + 1 = 666.

It is not a de Polignac number, because 4034784255921 - 2⁶ = 4034784255857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4034784255221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1439450706 + ... + 1439453508.

It is an arithmetic number, because the mean of its divisors is an integer number (96143734260).

Almost surely, 2^{4034784255921} is an apocalyptic number.

It is an amenable number.

4034784255921 is a deficient number, since it is larger than the sum of its proper divisors (2118414736719).

4034784255921 is a wasteful number, since it uses less digits than its factorization.

4034784255921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663 (or 5657 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 4034784255921 in words is "four trillion, thirty-four billion, seven hundred eighty-four million, two hundred fifty-five thousand, nine hundred twenty-one".