630687919682 has 4 divisors (see below), whose sum is σ = 946031879526. Its totient is φ = 315343959840.

The previous prime is 630687919571. The next prime is 630687919709. The reversal of 630687919682 is 286919786036.

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

It can be written as a sum of positive squares in only one way, i.e., 444410222881 + 186277696801 = 666641^2 + 431599^2 .

It is a super-2 number, since 2×630687919682² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157671979919 + ... + 157671979922.

Almost surely, 2^630687919682 is an apocalyptic number.

630687919682 is a deficient number, since it is larger than the sum of its proper divisors (315343959844).

630687919682 is a wasteful number, since it uses less digits than its factorization.

630687919682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315343959843.

The product of its (nonzero) digits is 47029248, while the sum is 65.

The spelling of 630687919682 in words is "six hundred thirty billion, six hundred eighty-seven million, nine hundred nineteen thousand, six hundred eighty-two".