687057551426057 has 8 divisors (see below), whose sum is σ = 795964912807296. Its totient is φ = 580839260696352.

The previous prime is 687057551426053. The next prime is 687057551426083. The reversal of 687057551426057 is 750624155750786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 687057551426057 - 2² = 687057551426053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687057551426053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672267662333 + ... + 672267663354.

It is an arithmetic number, because the mean of its divisors is an integer number (99495614100912).

Almost surely, 2^{687057551426057} is an apocalyptic number.

It is an amenable number.

687057551426057 is a deficient number, since it is larger than the sum of its proper divisors (108907361381239).

687057551426057 is a wasteful number, since it uses less digits than its factorization.

687057551426057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344535325767.

The product of its (nonzero) digits is 493920000, while the sum is 68.

The spelling of 687057551426057 in words is "six hundred eighty-seven trillion, fifty-seven billion, five hundred fifty-one million, four hundred twenty-six thousand, fifty-seven".