687920263860 has 48 divisors (see below), whose sum is σ = 1962519705216. Its totient is φ = 179984168832.

The previous prime is 687920263837. The next prime is 687920263867. The reversal of 687920263860 is 68362029786.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 687920263860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687920263867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108160384 + ... + 108166743.

It is an arithmetic number, because the mean of its divisors is an integer number (40885827192).

Almost surely, 2^687920263860 is an apocalyptic number.

687920263860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687920263860 is an abundant number, since it is smaller than the sum of its proper divisors (1274599441356).

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

687920263860 is a wasteful number, since it uses less digits than its factorization.

687920263860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216327192 (or 216327190 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 687920263860 in words is "six hundred eighty-seven billion, nine hundred twenty million, two hundred sixty-three thousand, eight hundred sixty".