633655560640123 has 64 divisors (see below), whose sum is σ = 764568879759360. Its totient is φ = 514206847896480.

The previous prime is 633655560640093. The next prime is 633655560640147. The reversal of 633655560640123 is 321046065556336.

It is not a de Polignac number, because 633655560640123 - 2¹⁷ = 633655560509051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (633655560640423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24885333090 + ... + 24885358552.

It is an arithmetic number, because the mean of its divisors is an integer number (11946388746240).

Almost surely, 2^{633655560640123} is an apocalyptic number.

633655560640123 is a deficient number, since it is larger than the sum of its proper divisors (130913319119237).

633655560640123 is an equidigital number, since it uses as much as digits as its factorization.

633655560640123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28149 (or 28087 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 55.

The spelling of 633655560640123 in words is "six hundred thirty-three trillion, six hundred fifty-five billion, five hundred sixty million, six hundred forty thousand, one hundred twenty-three".