40155745 has 12 divisors (see below), whose sum is σ = 56054484. Its totient is φ = 27535200.

The previous prime is 40155737. The next prime is 40155761. The reversal of 40155745 is 54755104.

It can be written as a sum of positive squares in 2 ways, for example, as 17230801 + 22924944 = 4151^2 + 4788^2 .

It is not a de Polignac number, because 40155745 - 2³ = 40155737 is a prime.

It is a super-2 number, since 2×40155745² = 3224967713010050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81706 + ... + 82195.

It is an arithmetic number, because the mean of its divisors is an integer number (4671207).

Almost surely, 2^40155745 is an apocalyptic number.

It is an amenable number.

40155745 is a deficient number, since it is larger than the sum of its proper divisors (15898739).

40155745 is a wasteful number, since it uses less digits than its factorization.

40155745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163920 (or 163913 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 40155745 is about 6336.8560816859. The cubic root of 40155745 is about 342.4384815007.

The spelling of 40155745 in words is "forty million, one hundred fifty-five thousand, seven hundred forty-five".