4064400981 has 12 divisors (see below), whose sum is σ = 5880481152. Its totient is φ = 2705133096.

The previous prime is 4064400947. The next prime is 4064401007. The reversal of 4064400981 is 1890044604.

It is a happy number.

4064400981 is a `hidden beast` number, since 4 + 0 + 644 + 0 + 0 + 9 + 8 + 1 = 666.

4064400981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4064400981 - 2¹³ = 4064392789 is a prime.

It is a super-2 number, since 2×4064400981² = 33038710668707524722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4064400481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 366531 + ... + 377456.

It is an arithmetic number, because the mean of its divisors is an integer number (490040096).

Almost surely, 2^4064400981 is an apocalyptic number.

It is an amenable number.

4064400981 is a deficient number, since it is larger than the sum of its proper divisors (1816080171).

4064400981 is a wasteful number, since it uses less digits than its factorization.

4064400981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744600 (or 744597 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 4064400981 is about 63752.6546976673. The cubic root of 4064400981 is about 1595.8749183542.

The spelling of 4064400981 in words is "four billion, sixty-four million, four hundred thousand, nine hundred eighty-one".