40000000149 has 8 divisors (see below), whose sum is σ = 59259259520. Its totient is φ = 26666666748.

The previous prime is 40000000141. The next prime is 40000000171. The reversal of 40000000149 is 94100000004.

It is not a de Polignac number, because 40000000149 - 2³ = 40000000141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000000141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740740717 + ... + 740740770.

It is an arithmetic number, because the mean of its divisors is an integer number (7407407440).

Almost surely, 2^40000000149 is an apocalyptic number.

It is an amenable number.

40000000149 is a deficient number, since it is larger than the sum of its proper divisors (19259259371).

40000000149 is a wasteful number, since it uses less digits than its factorization.

40000000149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481481496 (or 1481481490 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 40000000149 in words is "forty billion, one hundred forty-nine", and thus it is an aban number.