4000723666545 has 32 divisors (see below), whose sum is σ = 6412213278720. Its totient is φ = 2130036408000.

The previous prime is 4000723666507. The next prime is 4000723666549. The reversal of 4000723666545 is 5456663270004.

It is not a de Polignac number, because 4000723666545 - 2⁹ = 4000723666033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4000723666494 and 4000723666503.

It is not an unprimeable number, because it can be changed into a prime (4000723666549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28983582 + ... + 29121288.

It is an arithmetic number, because the mean of its divisors is an integer number (200381664960).

Almost surely, 2^{4000723666545} is an apocalyptic number.

It is an amenable number.

4000723666545 is a deficient number, since it is larger than the sum of its proper divisors (2411489612175).

4000723666545 is a wasteful number, since it uses less digits than its factorization.

4000723666545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141045.

The product of its (nonzero) digits is 3628800, while the sum is 48.

The spelling of 4000723666545 in words is "four trillion, seven hundred twenty-three million, six hundred sixty-six thousand, five hundred forty-five".