40020155515 has 32 divisors (see below), whose sum is σ = 51398069184. Its totient is φ = 29808353280.

The previous prime is 40020155501. The next prime is 40020155551. The reversal of 40020155515 is 51555102004.

40020155515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40020155515 - 2⁷ = 40020155387 is a prime.

It is a super-2 number, since 2×40020155515² (a number of 22 digits) 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 31 ways as a sum of consecutive naturals, for example, 7245955 + ... + 7251475.

It is an arithmetic number, because the mean of its divisors is an integer number (1606189662).

Almost surely, 2^40020155515 is an apocalyptic number.

40020155515 is a deficient number, since it is larger than the sum of its proper divisors (11377913669).

40020155515 is a wasteful number, since it uses less digits than its factorization.

40020155515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6447.

The product of its (nonzero) digits is 5000, while the sum is 28.

Adding to 40020155515 its reverse (51555102004), we get a palindrome (91575257519).

The spelling of 40020155515 in words is "forty billion, twenty million, one hundred fifty-five thousand, five hundred fifteen".