111161510551 has 8 divisors (see below), whose sum is σ = 136814166944. Its totient is φ = 87951964320.

The previous prime is 111161510539. The next prime is 111161510563. The reversal of 111161510551 is 155015161111.

It is an interprime number because it is at equal distance from previous prime (111161510539) and next prime (111161510563).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111161510551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111161510951) 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, 610777440 + ... + 610777621.

It is an arithmetic number, because the mean of its divisors is an integer number (17101770868).

Almost surely, 2^111161510551 is an apocalyptic number.

111161510551 is a deficient number, since it is larger than the sum of its proper divisors (25652656393).

111161510551 is a wasteful number, since it uses less digits than its factorization.

111161510551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221555081.

The product of its (nonzero) digits is 750, while the sum is 28.

Adding to 111161510551 its reverse (155015161111), we get a palindrome (266176671662).

The spelling of 111161510551 in words is "one hundred eleven billion, one hundred sixty-one million, five hundred ten thousand, five hundred fifty-one".