111516451649 has 8 divisors (see below), whose sum is σ = 111853597320. Its totient is φ = 111179621376.

The previous prime is 111516451619. The next prime is 111516451663. The reversal of 111516451649 is 946154615111.

It can be written as a sum of positive squares in 4 ways, for example, as 18090250000 + 93426201649 = 134500^2 + 305657^2 .

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-111516451649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111516451619) 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, 639209 + ... + 794745.

It is an arithmetic number, because the mean of its divisors is an integer number (13981699665).

Almost surely, 2^111516451649 is an apocalyptic number.

It is an amenable number.

111516451649 is a deficient number, since it is larger than the sum of its proper divisors (337145671).

111516451649 is a wasteful number, since it uses less digits than its factorization.

111516451649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157699.

The product of its digits is 129600, while the sum is 44.

The spelling of 111516451649 in words is "one hundred eleven billion, five hundred sixteen million, four hundred fifty-one thousand, six hundred forty-nine".