630173155 has 4 divisors (see below), whose sum is σ = 756207792. Its totient is φ = 504138520.

The previous prime is 630173147. The next prime is 630173179. The reversal of 630173155 is 551371036.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 630173155 - 2³ = 630173147 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63017311 + ... + 63017320.

It is an arithmetic number, because the mean of its divisors is an integer number (189051948).

Almost surely, 2^630173155 is an apocalyptic number.

630173155 is a deficient number, since it is larger than the sum of its proper divisors (126034637).

630173155 is a wasteful number, since it uses less digits than its factorization.

630173155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126034636.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 630173155 is about 25103.2498892076. The cubic root of 630173155 is about 857.3404202868.

The spelling of 630173155 in words is "six hundred thirty million, one hundred seventy-three thousand, one hundred fifty-five".