111609463681 has 8 divisors (see below), whose sum is σ = 120349101600. Its totient is φ = 103156371360.

The previous prime is 111609463663. The next prime is 111609463723. The reversal of 111609463681 is 186364906111.

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

It is a cyclic number.

It is not a de Polignac number, because 111609463681 - 2⁹ = 111609463169 is a prime.

It is a super-2 number, since 2×111609463681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111609463621) 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, 71635591 + ... + 71637148.

It is an arithmetic number, because the mean of its divisors is an integer number (15043637700).

Almost surely, 2^111609463681 is an apocalyptic number.

It is an amenable number.

111609463681 is a deficient number, since it is larger than the sum of its proper divisors (8739637919).

111609463681 is a wasteful number, since it uses less digits than its factorization.

111609463681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143272799.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 111609463681 in words is "one hundred eleven billion, six hundred nine million, four hundred sixty-three thousand, six hundred eighty-one".