1165111516100 has 36 divisors (see below), whose sum is σ = 2889476561664. Its totient is φ = 399466805280.

The previous prime is 1165111516033. The next prime is 1165111516103. The reversal of 1165111516100 is 16151115611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1165111516103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 832221812 + ... + 832223211.

It is an arithmetic number, because the mean of its divisors is an integer number (80263237824).

Almost surely, 2^{1165111516100} is an apocalyptic number.

1165111516100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165111516100 is an abundant number, since it is smaller than the sum of its proper divisors (1724365045564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165111516100 is a wasteful number, since it uses less digits than its factorization.

1165111516100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664445044 (or 1664445037 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 29.

The spelling of 1165111516100 in words is "one trillion, one hundred sixty-five billion, one hundred eleven million, five hundred sixteen thousand, one hundred".