630684551 has 24 divisors (see below), whose sum is σ = 745598112. Its totient is φ = 522446400.

The previous prime is 630684503. The next prime is 630684559. The reversal of 630684551 is 155486036.

It is not a de Polignac number, because 630684551 - 2⁶ = 630684487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630684559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2152361 + ... + 2152653.

It is an arithmetic number, because the mean of its divisors is an integer number (31066588).

Almost surely, 2^630684551 is an apocalyptic number.

630684551 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

630684551 is a deficient number, since it is larger than the sum of its proper divisors (114913561).

630684551 is an equidigital number, since it uses as much as digits as its factorization.

630684551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 630684551 is about 25113.4336760229. The cubic root of 630684551 is about 857.5722729192.

The spelling of 630684551 in words is "six hundred thirty million, six hundred eighty-four thousand, five hundred fifty-one".