4002456645 has 48 divisors (see below), whose sum is σ = 7848614592. Its totient is φ = 1940578560.

The previous prime is 4002456643. The next prime is 4002456677. The reversal of 4002456645 is 5466542004.

4002456645 is a `hidden beast` number, since 4 + 0 + 0 + 2 + 4 + 5 + 6 + 645 = 666.

It is not a de Polignac number, because 4002456645 - 2¹ = 4002456643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002456643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 136372 + ... + 163101.

It is an arithmetic number, because the mean of its divisors is an integer number (163512804).

Almost surely, 2^4002456645 is an apocalyptic number.

4002456645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4002456645 is a deficient number, since it is larger than the sum of its proper divisors (3846157947).

4002456645 is a wasteful number, since it uses less digits than its factorization.

4002456645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299504 (or 299492 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 4002456645 is about 63264.9717063084. The cubic root of 4002456645 is about 1587.7259588670.

Adding to 4002456645 its reverse (5466542004), we get a palindrome (9468998649).

It can be divided in two parts, 40024 and 56645, that added together give a palindrome (96669).

The spelling of 4002456645 in words is "four billion, two million, four hundred fifty-six thousand, six hundred forty-five".