40505032155 has 32 divisors (see below), whose sum is σ = 74392671744. Its totient is φ = 18435004416.

The previous prime is 40505032129. The next prime is 40505032157. The reversal of 40505032155 is 55123050504.

It is a happy number.

It is not a de Polignac number, because 40505032155 - 2⁵ = 40505032123 is a prime.

It is a super-3 number, since 3×40505032155³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40505032157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 825862 + ... + 873531.

It is an arithmetic number, because the mean of its divisors is an integer number (2324770992).

Almost surely, 2^40505032155 is an apocalyptic number.

40505032155 is a deficient number, since it is larger than the sum of its proper divisors (33887639589).

40505032155 is a wasteful number, since it uses less digits than its factorization.

40505032155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699635.

The product of its (nonzero) digits is 15000, while the sum is 30.

Adding to 40505032155 its reverse (55123050504), we get a palindrome (95628082659).

The spelling of 40505032155 in words is "forty billion, five hundred five million, thirty-two thousand, one hundred fifty-five".