169997943812 has 6 divisors (see below), whose sum is σ = 297496401678. Its totient is φ = 84998971904.

The previous prime is 169997943761. The next prime is 169997943883. The reversal of 169997943812 is 218349799961.

It can be written as a sum of positive squares in only one way, i.e., 89146433476 + 80851510336 = 298574^2 + 284344^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21249742973 + ... + 21249742980.

It is an arithmetic number, because the mean of its divisors is an integer number (49582733613).

Almost surely, 2^169997943812 is an apocalyptic number.

It is an amenable number.

169997943812 is a deficient number, since it is larger than the sum of its proper divisors (127498457866).

169997943812 is a wasteful number, since it uses less digits than its factorization.

169997943812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42499485957 (or 42499485955 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 68.

The spelling of 169997943812 in words is "one hundred sixty-nine billion, nine hundred ninety-seven million, nine hundred forty-three thousand, eight hundred twelve".