687432240652 has 24 divisors (see below), whose sum is σ = 1215980358320. Its totient is φ = 340012615680.

The previous prime is 687432240629. The next prime is 687432240653. The reversal of 687432240652 is 256042234786.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 687432240596 and 687432240605.

It is not an unprimeable number, because it can be changed into a prime (687432240653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411124 + ... + 1242532.

Almost surely, 2^687432240652 is an apocalyptic number.

It is an amenable number.

687432240652 is a deficient number, since it is larger than the sum of its proper divisors (528548117668).

687432240652 is a wasteful number, since it uses less digits than its factorization.

687432240652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833641 (or 833639 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 687432240652 in words is "six hundred eighty-seven billion, four hundred thirty-two million, two hundred forty thousand, six hundred fifty-two".