40145655 has 32 divisors (see below), whose sum is σ = 70357248. Its totient is φ = 19385600.

The previous prime is 40145641. The next prime is 40145701. The reversal of 40145655 is 55654104.

It is not a de Polignac number, because 40145655 - 2⁴ = 40145639 is a prime.

It is a super-2 number, since 2×40145655² = 3223347230758050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76795 + ... + 77315.

It is an arithmetic number, because the mean of its divisors is an integer number (2198664).

Almost surely, 2^40145655 is an apocalyptic number.

40145655 is a deficient number, since it is larger than the sum of its proper divisors (30211593).

40145655 is a wasteful number, since it uses less digits than its factorization.

40145655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007.

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

The square root of 40145655 is about 6336.0598955502. The cubic root of 40145655 is about 342.4097974049.

Adding to 40145655 its reverse (55654104), we get a palindrome (95799759).

It can be divided in two parts, 4014 and 5655, that added together give a palindrome (9669).

The spelling of 40145655 in words is "forty million, one hundred forty-five thousand, six hundred fifty-five".