687497927711 has 4 divisors (see below), whose sum is σ = 785711917392. Its totient is φ = 589283938032.

The previous prime is 687497927671. The next prime is 687497927719. The reversal of 687497927711 is 117729794786.

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

It is a cyclic number.

It is not a de Polignac number, because 687497927711 - 2⁶ = 687497927647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687497927719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49106994830 + ... + 49106994843.

It is an arithmetic number, because the mean of its divisors is an integer number (196427979348).

Almost surely, 2^687497927711 is an apocalyptic number.

687497927711 is a deficient number, since it is larger than the sum of its proper divisors (98213989681).

687497927711 is an equidigital number, since it uses as much as digits as its factorization.

687497927711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98213989680.

The product of its digits is 74680704, while the sum is 68.

The spelling of 687497927711 in words is "six hundred eighty-seven billion, four hundred ninety-seven million, nine hundred twenty-seven thousand, seven hundred eleven".