120928123699956 has 18 divisors (see below), whose sum is σ = 305679423797202. Its totient is φ = 40309374566640.

The previous prime is 120928123699897. The next prime is 120928123699963. The reversal of 120928123699956 is 659996321829021.

120928123699956 is a `hidden beast` number, since 1 + 20 + 9 + 281 + 236 + 9 + 9 + 95 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120694173488100 + 233950211856 = 10986090^2 + 483684^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×120928123699956² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1679557273575 + ... + 1679557273646.

Almost surely, 2^{120928123699956} is an apocalyptic number.

It is an amenable number.

120928123699956 is an abundant number, since it is smaller than the sum of its proper divisors (184751300097246).

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

120928123699956 is a wasteful number, since it uses less digits than its factorization.

120928123699956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359114547231 (or 3359114547226 counting only the distinct ones).

The product of its (nonzero) digits is 226748160, while the sum is 72.

The spelling of 120928123699956 in words is "one hundred twenty trillion, nine hundred twenty-eight billion, one hundred twenty-three million, six hundred ninety-nine thousand, nine hundred fifty-six".