4051921057 has 16 divisors (see below), whose sum is σ = 4299860160. Its totient is φ = 3807559872.

The previous prime is 4051921051. The next prime is 4051921087. The reversal of 4051921057 is 7501291504.

It is not a de Polignac number, because 4051921057 - 2¹⁵ = 4051888289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4051921051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1717923 + ... + 1720279.

It is an arithmetic number, because the mean of its divisors is an integer number (268741260).

Almost surely, 2^4051921057 is an apocalyptic number.

It is an amenable number.

4051921057 is a deficient number, since it is larger than the sum of its proper divisors (247939103).

4051921057 is a wasteful number, since it uses less digits than its factorization.

4051921057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 4051921057 is about 63654.7017666409. The cubic root of 4051921057 is about 1594.2398420448.

The spelling of 4051921057 in words is "four billion, fifty-one million, nine hundred twenty-one thousand, fifty-seven".