120655563 has 16 divisors (see below), whose sum is σ = 184924416. Its totient is φ = 68545440.

The previous prime is 120655559. The next prime is 120655571. The reversal of 120655563 is 365556021.

It is not a de Polignac number, because 120655563 - 2² = 120655559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120655363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12973 + ... + 20238.

It is an arithmetic number, because the mean of its divisors is an integer number (11557776).

Almost surely, 2^120655563 is an apocalyptic number.

120655563 is a deficient number, since it is larger than the sum of its proper divisors (64268853).

120655563 is a wasteful number, since it uses less digits than its factorization.

120655563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33394.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 120655563 is about 10984.3326151387. The cubic root of 120655563 is about 494.1389827330.

The spelling of 120655563 in words is "one hundred twenty million, six hundred fifty-five thousand, five hundred sixty-three".