687491550055 has 12 divisors (see below), whose sum is σ = 876373313400. Its totient is φ = 517640695424.

The previous prime is 687491550049. The next prime is 687491550071. The reversal of 687491550055 is 550055194786.

It is not a de Polignac number, because 687491550055 - 2¹⁵ = 687491517287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687491549978 and 687491550005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237884905 + ... + 237887794.

It is an arithmetic number, because the mean of its divisors is an integer number (73031109450).

Almost surely, 2^687491550055 is an apocalyptic number.

687491550055 is a deficient number, since it is larger than the sum of its proper divisors (188881763345).

687491550055 is a wasteful number, since it uses less digits than its factorization.

687491550055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475772738 (or 475772721 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 55.

The spelling of 687491550055 in words is "six hundred eighty-seven billion, four hundred ninety-one million, five hundred fifty thousand, fifty-five".