120456340555656 has 128 divisors (see below), whose sum is σ = 359145254983680. Its totient is φ = 32917842118656.

The previous prime is 120456340555571. The next prime is 120456340555667. The reversal of 120456340555656 is 656555043654021.

It is a super-4 number, since 4×120456340555656⁴ (a number of 57 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120456340555596 and 120456340555605.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66600120 + ... + 68384856.

It is an arithmetic number, because the mean of its divisors is an integer number (2805822304560).

Almost surely, 2^{120456340555656} is an apocalyptic number.

It is an amenable number.

120456340555656 is an abundant number, since it is smaller than the sum of its proper divisors (238688914428024).

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

120456340555656 is a wasteful number, since it uses less digits than its factorization.

120456340555656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802243 (or 1802239 counting only the distinct ones).

The product of its (nonzero) digits is 64800000, while the sum is 57.

The spelling of 120456340555656 in words is "one hundred twenty trillion, four hundred fifty-six billion, three hundred forty million, five hundred fifty-five thousand, six hundred fifty-six".