40445501640 has 32 divisors (see below), whose sum is σ = 121336505280. Its totient is φ = 10785467072.

The previous prime is 40445501497. The next prime is 40445501653. The reversal of 40445501640 is 4610554404.

It is a super-2 number, since 2×40445501640² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168522804 + ... + 168523043.

It is an arithmetic number, because the mean of its divisors is an integer number (3791765790).

Almost surely, 2^40445501640 is an apocalyptic number.

40445501640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40445501640 is an abundant number, since it is smaller than the sum of its proper divisors (80891003640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40445501640 is a wasteful number, since it uses less digits than its factorization.

40445501640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337045861 (or 337045857 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 40445501640 in words is "forty billion, four hundred forty-five million, five hundred one thousand, six hundred forty".