687055048157 has 4 divisors (see below), whose sum is σ = 687056883036. Its totient is φ = 687053213280.

The previous prime is 687055048151. The next prime is 687055048181. The reversal of 687055048157 is 751840550786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 429167801881 + 257887246276 = 655109^2 + 507826^2 .

It is a cyclic number.

It is not a de Polignac number, because 687055048157 - 2³⁶ = 618335571421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687055048151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131144 + ... + 1179537.

It is an arithmetic number, because the mean of its divisors is an integer number (171764220759).

Almost surely, 2^687055048157 is an apocalyptic number.

It is an amenable number.

687055048157 is a deficient number, since it is larger than the sum of its proper divisors (1834879).

687055048157 is a wasteful number, since it uses less digits than its factorization.

687055048157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834878.

The product of its (nonzero) digits is 9408000, while the sum is 56.

The spelling of 687055048157 in words is "six hundred eighty-seven billion, fifty-five million, forty-eight thousand, one hundred fifty-seven".