4021979056 has 10 divisors (see below), whose sum is σ = 7792584452. Its totient is φ = 2010989520.

The previous prime is 4021979053. The next prime is 4021979141. The reversal of 4021979056 is 6509791204.

It is a happy number.

It is a super-2 number, since 2×4021979056² = 32352631053805302272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4021979053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125686830 + ... + 125686861.

Almost surely, 2^4021979056 is an apocalyptic number.

It is an amenable number.

4021979056 is a deficient number, since it is larger than the sum of its proper divisors (3770605396).

4021979056 is a wasteful number, since it uses less digits than its factorization.

4021979056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251373699 (or 251373693 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 4021979056 is about 63419.0748592251. The cubic root of 4021979056 is about 1590.3032076056.

The spelling of 4021979056 in words is "four billion, twenty-one million, nine hundred seventy-nine thousand, fifty-six".