120261565611 has 24 divisors (see below), whose sum is σ = 192099017136. Its totient is φ = 71887357440.

The previous prime is 120261565609. The next prime is 120261565649. The reversal of 120261565611 is 116565162021.

120261565611 is a `hidden beast` number, since 1 + 2 + 0 + 26 + 15 + 6 + 5 + 611 = 666.

It is not a de Polignac number, because 120261565611 - 2¹ = 120261565609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120261565681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8313070 + ... + 8327523.

It is an arithmetic number, because the mean of its divisors is an integer number (8004125714).

Almost surely, 2^120261565611 is an apocalyptic number.

120261565611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120261565611 is a deficient number, since it is larger than the sum of its proper divisors (71837451525).

120261565611 is a wasteful number, since it uses less digits than its factorization.

120261565611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16640683 (or 16640680 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 120261565611 in words is "one hundred twenty billion, two hundred sixty-one million, five hundred sixty-five thousand, six hundred eleven".