111540513542015 has 16 divisors (see below), whose sum is σ = 139803590048256. Its totient is φ = 85269954343200.

The previous prime is 111540513541999. The next prime is 111540513542041. The reversal of 111540513542015 is 510245315045111.

It is not a de Polignac number, because 111540513542015 - 2⁴ = 111540513541999 is a prime.

It is a super-2 number, since 2×111540513542015² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111540513542015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470258501 + ... + 470495630.

It is an arithmetic number, because the mean of its divisors is an integer number (8737724378016).

Almost surely, 2^{111540513542015} is an apocalyptic number.

111540513542015 is a deficient number, since it is larger than the sum of its proper divisors (28263076506241).

111540513542015 is a wasteful number, since it uses less digits than its factorization.

111540513542015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940755190.

The product of its (nonzero) digits is 60000, while the sum is 38.

Adding to 111540513542015 its reverse (510245315045111), we get a palindrome (621785828587126).

The spelling of 111540513542015 in words is "one hundred eleven trillion, five hundred forty billion, five hundred thirteen million, five hundred forty-two thousand, fifteen".