111511616061 has 16 divisors (see below), whose sum is σ = 149341196160. Its totient is φ = 74012137920.

The previous prime is 111511616053. The next prime is 111511616081. The reversal of 111511616061 is 160616115111.

It is not a de Polignac number, because 111511616061 - 2³ = 111511616053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111511616081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701371 + ... + 845543.

It is an arithmetic number, because the mean of its divisors is an integer number (9333824760).

Almost surely, 2^111511616061 is an apocalyptic number.

It is an amenable number.

111511616061 is a deficient number, since it is larger than the sum of its proper divisors (37829580099).

111511616061 is a wasteful number, since it uses less digits than its factorization.

111511616061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145316.

The product of its (nonzero) digits is 1080, while the sum is 30.

The spelling of 111511616061 in words is "one hundred eleven billion, five hundred eleven million, six hundred sixteen thousand, sixty-one".