44613681 has 16 divisors (see below), whose sum is σ = 70176768. Its totient is φ = 24670800.

The previous prime is 44613677. The next prime is 44613683. The reversal of 44613681 is 18631644.

It is not a de Polignac number, because 44613681 - 2² = 44613677 is a prime.

It is a super-2 number, since 2×44613681² = 3980761064739522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (44613683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33615 + ... + 34916.

It is an arithmetic number, because the mean of its divisors is an integer number (4386048).

Almost surely, 2^44613681 is an apocalyptic number.

It is an amenable number.

44613681 is a deficient number, since it is larger than the sum of its proper divisors (25563087).

44613681 is a wasteful number, since it uses less digits than its factorization.

44613681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68572.

The product of its digits is 13824, while the sum is 33.

The square root of 44613681 is about 6679.3473483567. The cubic root of 44613681 is about 354.6685552872.

The spelling of 44613681 in words is "forty-four million, six hundred thirteen thousand, six hundred eighty-one".