40645155 has 8 divisors (see below), whose sum is σ = 65032272. Its totient is φ = 21677408.

The previous prime is 40645133. The next prime is 40645217. The reversal of 40645155 is 55154604.

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

It is a cyclic number.

It is not a de Polignac number, because 40645155 - 2⁷ = 40645027 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1354824 + ... + 1354853.

It is an arithmetic number, because the mean of its divisors is an integer number (8129034).

Almost surely, 2^40645155 is an apocalyptic number.

40645155 is a deficient number, since it is larger than the sum of its proper divisors (24387117).

40645155 is a wasteful number, since it uses less digits than its factorization.

40645155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709685.

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

The square root of 40645155 is about 6375.3552842175. The cubic root of 40645155 is about 343.8240576527.

Adding to 40645155 its reverse (55154604), we get a palindrome (95799759).

The spelling of 40645155 in words is "forty million, six hundred forty-five thousand, one hundred fifty-five".