687878822225 has 24 divisors (see below), whose sum is σ = 975161871360. Its totient is φ = 471524152320.

The previous prime is 687878822149. The next prime is 687878822249. The reversal of 687878822225 is 522228878786.

It is not a de Polignac number, because 687878822225 - 2⁸ = 687878821969 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178832 + ... + 1186481.

It is an arithmetic number, because the mean of its divisors is an integer number (40631744640).

Almost surely, 2^687878822225 is an apocalyptic number.

It is an amenable number.

687878822225 is a deficient number, since it is larger than the sum of its proper divisors (287283049135).

687878822225 is a wasteful number, since it uses less digits than its factorization.

687878822225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368209 (or 1368204 counting only the distinct ones).

The product of its digits is 96337920, while the sum is 65.

The spelling of 687878822225 in words is "six hundred eighty-seven billion, eight hundred seventy-eight million, eight hundred twenty-two thousand, two hundred twenty-five".