40581660723 has 16 divisors (see below), whose sum is σ = 55512576672. Its totient is φ = 26354592000.

The previous prime is 40581660697. The next prime is 40581660727. The reversal of 40581660723 is 32706618504.

It is not a de Polignac number, because 40581660723 - 2²⁰ = 40580612147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40581660727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168268 + ... + 330873.

It is an arithmetic number, because the mean of its divisors is an integer number (3469536042).

Almost surely, 2^40581660723 is an apocalyptic number.

40581660723 is a deficient number, since it is larger than the sum of its proper divisors (14930915949).

40581660723 is a wasteful number, since it uses less digits than its factorization.

40581660723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499846.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 40581660723 in words is "forty billion, five hundred eighty-one million, six hundred sixty thousand, seven hundred twenty-three".