40045555 has 12 divisors (see below), whose sum is σ = 52821216. Its totient is φ = 29123600.

The previous prime is 40045547. The next prime is 40045589. The reversal of 40045555 is 55554004.

It is not a de Polignac number, because 40045555 - 2³ = 40045547 is a prime.

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, 32491 + ... + 33700.

It is an arithmetic number, because the mean of its divisors is an integer number (4401768).

Almost surely, 2^40045555 is an apocalyptic number.

40045555 is a deficient number, since it is larger than the sum of its proper divisors (12775661).

40045555 is a wasteful number, since it uses less digits than its factorization.

40045555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66218 (or 66207 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 40045555 is about 6328.1557344933. The cubic root of 40045555 is about 342.1249700036.

Adding to 40045555 its reverse (55554004), we get a palindrome (95599559).

It can be divided in two parts, 4004 and 5555, that added together give a palindrome (9559).

The spelling of 40045555 in words is "forty million, forty-five thousand, five hundred fifty-five".