168585194420 has 18 divisors (see below), whose sum is σ = 354032764386. Its totient is φ = 67433343280.

The previous prime is 168585194353. The next prime is 168585194471. The reversal of 168585194420 is 24491585861.

It can be written as a sum of positive squares in only one way, i.e., 134868155536 + 33717038884 = 367244^2 + 183622^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1790315 + ... + 1882125.

Almost surely, 2^168585194420 is an apocalyptic number.

168585194420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168585194420 is an abundant number, since it is smaller than the sum of its proper divisors (185447569966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168585194420 is an frugal number, since it uses more digits than its factorization.

168585194420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183631 (or 91818 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 168585194420 in words is "one hundred sixty-eight billion, five hundred eighty-five million, one hundred ninety-four thousand, four hundred twenty".