44001661640464 has 20 divisors (see below), whose sum is σ = 93003512104080. Its totient is φ = 20000755291040.

The previous prime is 44001661640459. The next prime is 44001661640471. The reversal of 44001661640464 is 46404616610044.

It is a happy number.

It is a super-2 number, since 2×44001661640464² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125004720394 + ... + 125004720745.

It is an arithmetic number, because the mean of its divisors is an integer number (4650175605204).

Almost surely, 2^{44001661640464} is an apocalyptic number.

44001661640464 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

44001661640464 is an abundant number, since it is smaller than the sum of its proper divisors (49001850463616).

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

44001661640464 is a wasteful number, since it uses less digits than its factorization.

44001661640464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250009441158 (or 250009441152 counting only the distinct ones).

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

The spelling of 44001661640464 in words is "forty-four trillion, one billion, six hundred sixty-one million, six hundred forty thousand, four hundred sixty-four".