169768520920 has 96 divisors (see below), whose sum is σ = 406845860400. Its totient is φ = 63728926976.

The previous prime is 169768520903. The next prime is 169768520939. The reversal of 169768520920 is 29025867961.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent 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, 1045791 + ... + 1197169.

Almost surely, 2^169768520920 is an apocalyptic number.

169768520920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169768520920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203422930200).

169768520920 is an abundant number, since it is smaller than the sum of its proper divisors (237077339480).

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

169768520920 is a wasteful number, since it uses less digits than its factorization.

169768520920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151489 (or 151462 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 169768520920 in words is "one hundred sixty-nine billion, seven hundred sixty-eight million, five hundred twenty thousand, nine hundred twenty".