40446631865 has 16 divisors (see below), whose sum is σ = 49122089280. Its totient is φ = 31968730560.

The previous prime is 40446631861. The next prime is 40446631867. The reversal of 40446631865 is 56813664404.

It is not a de Polignac number, because 40446631865 - 2² = 40446631861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40446631861) 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, 12671 + ... + 284699.

It is an arithmetic number, because the mean of its divisors is an integer number (3070130580).

Almost surely, 2^40446631865 is an apocalyptic number.

It is an amenable number.

40446631865 is a deficient number, since it is larger than the sum of its proper divisors (8675457415).

40446631865 is a wasteful number, since it uses less digits than its factorization.

40446631865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272392.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 40446631865 in words is "forty billion, four hundred forty-six million, six hundred thirty-one thousand, eight hundred sixty-five".