40446631864 has 8 divisors (see below), whose sum is σ = 75837434760. Its totient is φ = 20223315928.

The previous prime is 40446631861. The next prime is 40446631867. The reversal of 40446631864 is 46813664404.

It is an interprime number because it is at equal distance from previous prime (40446631861) and next prime (40446631867).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×40446631864² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2527914484 + ... + 2527914499.

It is an arithmetic number, because the mean of its divisors is an integer number (9479679345).

Almost surely, 2^40446631864 is an apocalyptic number.

It is an amenable number.

40446631864 is a deficient number, since it is larger than the sum of its proper divisors (35390802896).

40446631864 is a wasteful number, since it uses less digits than its factorization.

40446631864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055828989 (or 5055828985 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 40446631864 in words is "forty billion, four hundred forty-six million, six hundred thirty-one thousand, eight hundred sixty-four".