687809204607 has 160 divisors (see below), whose sum is σ = 1169317560320. Its totient is φ = 358227334080.

The previous prime is 687809204581. The next prime is 687809204647. The reversal of 687809204607 is 706402908786.

687809204607 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 687809204607 - 2⁶ = 687809204543 is a prime.

It is a super-2 number, since 2×687809204607² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687809204647) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 946092078 + ... + 946092804.

It is an arithmetic number, because the mean of its divisors is an integer number (7308234752).

Almost surely, 2^687809204607 is an apocalyptic number.

687809204607 is a deficient number, since it is larger than the sum of its proper divisors (481508355713).

687809204607 is a wasteful number, since it uses less digits than its factorization.

687809204607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 687809204607 in words is "six hundred eighty-seven billion, eight hundred nine million, two hundred four thousand, six hundred seven".