40681109446 has 32 divisors (see below), whose sum is σ = 65606948352. Its totient is φ = 18849283200.

The previous prime is 40681109431. The next prime is 40681109449. The reversal of 40681109446 is 64490118604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40681109449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8214271 + ... + 8219221.

It is an arithmetic number, because the mean of its divisors is an integer number (2050217136).

Almost surely, 2^40681109446 is an apocalyptic number.

40681109446 is a deficient number, since it is larger than the sum of its proper divisors (24925838906).

40681109446 is a wasteful number, since it uses less digits than its factorization.

40681109446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8644.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 40681109446 in words is "forty billion, six hundred eighty-one million, one hundred nine thousand, four hundred forty-six".