44145393640 has 72 divisors (see below), whose sum is σ = 100467217890. Its totient is φ = 17457768384.

The previous prime is 44145393631. The next prime is 44145393659. The reversal of 44145393640 is 4639354144.

It can be written as a sum of positive squares in only one way, i.e., 39730854276 + 4414539364 = 199326^2 + 66442^2 .

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 184708641 + ... + 184708879.

Almost surely, 2^44145393640 is an apocalyptic number.

44145393640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44145393640 is an abundant number, since it is smaller than the sum of its proper divisors (56321824250).

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

44145393640 is an equidigital number, since it uses as much as digits as its factorization.

44145393640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 44145393640 in words is "forty-four billion, one hundred forty-five million, three hundred ninety-three thousand, six hundred forty".