40944308409 has 15 divisors (see below), whose sum is σ = 61166440533. Its totient is φ = 27294991524.

The previous prime is 40944308399. The next prime is 40944308473. The reversal of 40944308409 is 90480344904.

The square root of 40944308409 is 202347.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 40944308409 - 2⁷ = 40944308281 is a prime.

It is a super-2 number, since 2×40944308409² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40944308809) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1809882 + ... + 1832364.

Almost surely, 2^40944308409 is an apocalyptic number.

40944308409 is the 202347-th square number.

40944308409 is the 101174-th centered octagonal number.

It is an amenable number.

40944308409 is a deficient number, since it is larger than the sum of its proper divisors (20222132124).

40944308409 is an frugal number, since it uses more digits than its factorization.

40944308409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44978 (or 22486 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 40944308409 in words is "forty billion, nine hundred forty-four million, three hundred eight thousand, four hundred nine".