687343647590 has 16 divisors (see below), whose sum is σ = 1309996128672. Its totient is φ = 258764667264.

The previous prime is 687343647587. The next prime is 687343647623. The reversal of 687343647590 is 95746343786.

687343647590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×687343647590² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021598794 + ... + 2021599133.

It is an arithmetic number, because the mean of its divisors is an integer number (81874758042).

Almost surely, 2^687343647590 is an apocalyptic number.

687343647590 is a deficient number, since it is larger than the sum of its proper divisors (622652481082).

687343647590 is a wasteful number, since it uses less digits than its factorization.

687343647590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043197951.

The product of its (nonzero) digits is 91445760, while the sum is 62.

The spelling of 687343647590 in words is "six hundred eighty-seven billion, three hundred forty-three million, six hundred forty-seven thousand, five hundred ninety".