687147481338 has 16 divisors (see below), whose sum is σ = 1374304186080. Its totient is φ = 229047623216.

The previous prime is 687147481331. The next prime is 687147481367. The reversal of 687147481338 is 833184741786.

It is a super-2 number, since 2×687147481338² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (687147481331) 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, 929908 + ... + 1496336.

It is an arithmetic number, because the mean of its divisors is an integer number (85894011630).

Almost surely, 2^687147481338 is an apocalyptic number.

687147481338 is an abundant number, since it is smaller than the sum of its proper divisors (687156704742).

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

687147481338 is a wasteful number, since it uses less digits than its factorization.

687147481338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768621.

The product of its digits is 21676032, while the sum is 60.

The spelling of 687147481338 in words is "six hundred eighty-seven billion, one hundred forty-seven million, four hundred eighty-one thousand, three hundred thirty-eight".