630491955 has 32 divisors (see below), whose sum is σ = 1018552320. Its totient is φ = 333025920.

The previous prime is 630491941. The next prime is 630491957. The reversal of 630491955 is 559194036.

It is not a de Polignac number, because 630491955 - 2⁹ = 630491443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (630491957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1028229 + ... + 1028841.

It is an arithmetic number, because the mean of its divisors is an integer number (31829760).

Almost surely, 2^630491955 is an apocalyptic number.

630491955 is a deficient number, since it is larger than the sum of its proper divisors (388060365).

630491955 is a wasteful number, since it uses less digits than its factorization.

630491955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 630491955 is about 25109.5988617899. The cubic root of 630491955 is about 857.4849700012.

The spelling of 630491955 in words is "six hundred thirty million, four hundred ninety-one thousand, nine hundred fifty-five".