111665414101551 has 8 divisors (see below), whose sum is σ = 148887370849200. Its totient is φ = 74443533377472.

The previous prime is 111665414101531. The next prime is 111665414101567. The reversal of 111665414101551 is 155101414566111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111665414101551 - 2¹⁴ = 111665414085167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111665414101511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15485476 + ... + 21520473.

It is an arithmetic number, because the mean of its divisors is an integer number (18610921356150).

Almost surely, 2^{111665414101551} is an apocalyptic number.

111665414101551 is a deficient number, since it is larger than the sum of its proper divisors (37221956747649).

111665414101551 is a wasteful number, since it uses less digits than its factorization.

111665414101551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38011785.

The product of its (nonzero) digits is 72000, while the sum is 42.

Adding to 111665414101551 its reverse (155101414566111), we get a palindrome (266766828667662).

The spelling of 111665414101551 in words is "one hundred eleven trillion, six hundred sixty-five billion, four hundred fourteen million, one hundred one thousand, five hundred fifty-one".