630151688 has 8 divisors (see below), whose sum is σ = 1181534430. Its totient is φ = 315075840.

The previous prime is 630151679. The next prime is 630151703. The reversal of 630151688 is 886151036.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 351862564 + 278289124 = 18758^2 + 16682^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×630151688² = 794182299778498688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39384473 + ... + 39384488.

Almost surely, 2^630151688 is an apocalyptic number.

It is an amenable number.

630151688 is a deficient number, since it is larger than the sum of its proper divisors (551382742).

630151688 is a wasteful number, since it uses less digits than its factorization.

630151688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78768967 (or 78768963 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 630151688 is about 25102.8223114454. The cubic root of 630151688 is about 857.3306850071.

The spelling of 630151688 in words is "six hundred thirty million, one hundred fifty-one thousand, six hundred eighty-eight".