10111515661660 has 24 divisors (see below), whose sum is σ = 24267637588320. Its totient is φ = 3466805369664.

The previous prime is 10111515661649. The next prime is 10111515661661. The reversal of 10111515661660 is 6616651511101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111515661661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36112555795 + ... + 36112556074.

It is an arithmetic number, because the mean of its divisors is an integer number (1011151566180).

Almost surely, 2^{10111515661660} is an apocalyptic number.

10111515661660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111515661660 is an abundant number, since it is smaller than the sum of its proper divisors (14156121926660).

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

10111515661660 is a wasteful number, since it uses less digits than its factorization.

10111515661660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72225111885 (or 72225111883 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 10111515661660 in words is "ten trillion, one hundred eleven billion, five hundred fifteen million, six hundred sixty-one thousand, six hundred sixty".