655871309818 has 16 divisors (see below), whose sum is σ = 1037832697440. Its totient is φ = 310001958000.

The previous prime is 655871309803. The next prime is 655871309839. The reversal of 655871309818 is 818903178556.

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, 18702408 + ... + 18737443.

It is an arithmetic number, because the mean of its divisors is an integer number (64864543590).

Almost surely, 2^655871309818 is an apocalyptic number.

655871309818 is a deficient number, since it is larger than the sum of its proper divisors (381961387622).

655871309818 is a wasteful number, since it uses less digits than its factorization.

655871309818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37440333.

The product of its (nonzero) digits is 14515200, while the sum is 61.

The spelling of 655871309818 in words is "six hundred fifty-five billion, eight hundred seventy-one million, three hundred nine thousand, eight hundred eighteen".