40545651 has 8 divisors (see below), whose sum is σ = 54147520. Its totient is φ = 26987112.

The previous prime is 40545647. The next prime is 40545667. The reversal of 40545651 is 15654504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40545651 - 2² = 40545647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40545611) 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, 8581 + ... + 12438.

It is an arithmetic number, because the mean of its divisors is an integer number (6768440).

Almost surely, 2^40545651 is an apocalyptic number.

40545651 is a deficient number, since it is larger than the sum of its proper divisors (13601869).

40545651 is a wasteful number, since it uses less digits than its factorization.

40545651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21665.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 40545651 is about 6367.5467018311. The cubic root of 40545651 is about 343.5432548095.

It can be divided in two parts, 405 and 45651, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 40545651 in words is "forty million, five hundred forty-five thousand, six hundred fifty-one".