120611655556020 has 72 divisors (see below), whose sum is σ = 378471057105960. Its totient is φ = 31054035452160.

The previous prime is 120611655555997. The next prime is 120611655556111. The reversal of 120611655556020 is 20655556116021.

It is a happy number.

120611655556020 is a `hidden beast` number, since 1 + 2 + 0 + 6 + 1 + 1 + 65 + 5 + 5 + 560 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20713949382564 + 99897706173456 = 4551258^2 + 9994884^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11552835351 + ... + 11552845790.

It is an arithmetic number, because the mean of its divisors is an integer number (5256542459805).

Almost surely, 2^{120611655556020} is an apocalyptic number.

120611655556020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120611655556020 is an abundant number, since it is smaller than the sum of its proper divisors (257859401549940).

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

120611655556020 is a wasteful number, since it uses less digits than its factorization.

120611655556020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23105681185 (or 23105681180 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 120611655556020 in words is "one hundred twenty trillion, six hundred eleven billion, six hundred fifty-five million, five hundred fifty-six thousand, twenty".