687503394144 has 120 divisors (see below), whose sum is σ = 2310775357968. Its totient is φ = 196429536000.

The previous prime is 687503394107. The next prime is 687503394157. The reversal of 687503394144 is 441493305786.

687503394144 is a `hidden beast` number, since 6 + 8 + 7 + 503 + 3 + 94 + 1 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18927607 + ... + 18963894.

Almost surely, 2^687503394144 is an apocalyptic number.

It is an amenable number.

687503394144 is an abundant number, since it is smaller than the sum of its proper divisors (1623271963824).

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

687503394144 is a wasteful number, since it uses less digits than its factorization.

687503394144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37891530 (or 37891513 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 687503394144 in words is "six hundred eighty-seven billion, five hundred three million, three hundred ninety-four thousand, one hundred forty-four".