4026445781 has 8 divisors (see below), whose sum is σ = 4251998400. Its totient is φ = 3802256640.

The previous prime is 4026445771. The next prime is 4026445789. The reversal of 4026445781 is 1875446204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4026445781 is a prime.

It is a super-2 number, since 2×4026445781² = 32424531254665399922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4026445789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334796 + ... + 346613.

It is an arithmetic number, because the mean of its divisors is an integer number (531499800).

Almost surely, 2^4026445781 is an apocalyptic number.

It is an amenable number.

4026445781 is a deficient number, since it is larger than the sum of its proper divisors (225552619).

4026445781 is a wasteful number, since it uses less digits than its factorization.

4026445781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681739.

The product of its (nonzero) digits is 215040, while the sum is 41.

The square root of 4026445781 is about 63454.2810297304. The cubic root of 4026445781 is about 1590.8917088526.

The spelling of 4026445781 in words is "four billion, twenty-six million, four hundred forty-five thousand, seven hundred eighty-one".