40512645 has 24 divisors (see below), whose sum is σ = 71416800. Its totient is φ = 21239136.

The previous prime is 40512643. The next prime is 40512673. The reversal of 40512645 is 54621504.

40512645 is a `hidden beast` number, since 4 + 0 + 5 + 12 + 645 = 666.

It is not a de Polignac number, because 40512645 - 2¹ = 40512643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40512643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4975 + ... + 10284.

It is an arithmetic number, because the mean of its divisors is an integer number (2975700).

Almost surely, 2^40512645 is an apocalyptic number.

40512645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40512645 is a deficient number, since it is larger than the sum of its proper divisors (30904155).

40512645 is a wasteful number, since it uses less digits than its factorization.

40512645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15329 (or 15326 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 40512645 is about 6364.9544381716. The cubic root of 40512645 is about 343.4500095694.

The spelling of 40512645 in words is "forty million, five hundred twelve thousand, six hundred forty-five".