687450431000 has 64 divisors (see below), whose sum is σ = 1608858089280. Its totient is φ = 274941868800.

The previous prime is 687450430991. The next prime is 687450431009. The reversal of 687450431000 is 134054786.

It is an interprime number because it is at equal distance from previous prime (687450430991) and next prime (687450431009).

It is a super-2 number, since 2×687450431000² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687450431009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7773029 + ... + 7860971.

It is an arithmetic number, because the mean of its divisors is an integer number (25138407645).

Almost surely, 2^687450431000 is an apocalyptic number.

It is an amenable number.

687450431000 is an abundant number, since it is smaller than the sum of its proper divisors (921407658280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687450431000 is a wasteful number, since it uses less digits than its factorization.

687450431000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95781 (or 95767 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

Adding to 687450431000 its reverse (134054786), we get a palindrome (687584485786).

The spelling of 687450431000 in words is "six hundred eighty-seven billion, four hundred fifty million, four hundred thirty-one thousand".