688355228474 has 16 divisors (see below), whose sum is σ = 1057840234920. Its totient is φ = 335743779840.

The previous prime is 688355228437. The next prime is 688355228537. The reversal of 688355228474 is 474822553886.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 554257915225 + 134097313249 = 744485^2 + 366193^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221162 + ... + 1193994.

Almost surely, 2^688355228474 is an apocalyptic number.

688355228474 is a deficient number, since it is larger than the sum of its proper divisors (369485006446).

688355228474 is a wasteful number, since it uses less digits than its factorization.

688355228474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981505.

The product of its digits is 103219200, while the sum is 62.

The spelling of 688355228474 in words is "six hundred eighty-eight billion, three hundred fifty-five million, two hundred twenty-eight thousand, four hundred seventy-four".