4021646451 has 16 divisors (see below), whose sum is σ = 5418040320. Its totient is φ = 2653236000.

The previous prime is 4021646449. The next prime is 4021646459. The reversal of 4021646451 is 1546461204.

It is not a de Polignac number, because 4021646451 - 2¹ = 4021646449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4021646459) 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, 275076 + ... + 289326.

It is an arithmetic number, because the mean of its divisors is an integer number (338627520).

Almost surely, 2^4021646451 is an apocalyptic number.

4021646451 is a deficient number, since it is larger than the sum of its proper divisors (1396393869).

4021646451 is a wasteful number, since it uses less digits than its factorization.

4021646451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15226.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 4021646451 is about 63416.4525261387. The cubic root of 4021646451 is about 1590.2593687083.

The spelling of 4021646451 in words is "four billion, twenty-one million, six hundred forty-six thousand, four hundred fifty-one".