687940825162126 has 32 divisors (see below), whose sum is σ = 1097649095352480. Its totient is φ = 322245589248000.

The previous prime is 687940825162099. The next prime is 687940825162159. The reversal of 687940825162126 is 621261528049786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1410225 + ... + 37119676.

It is an arithmetic number, because the mean of its divisors is an integer number (34301534229765).

Almost surely, 2^{687940825162126} is an apocalyptic number.

687940825162126 is a deficient number, since it is larger than the sum of its proper divisors (409708270190354).

687940825162126 is a wasteful number, since it uses less digits than its factorization.

687940825162126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38532340.

The product of its (nonzero) digits is 139345920, while the sum is 67.

The spelling of 687940825162126 in words is "six hundred eighty-seven trillion, nine hundred forty billion, eight hundred twenty-five million, one hundred sixty-two thousand, one hundred twenty-six".