169121648640 has 416 divisors, whose sum is σ = 620494592256. Its totient is φ = 38527303680.

The previous prime is 169121648609. The next prime is 169121648651. The reversal of 169121648640 is 46846121961.

It is a super-2 number, since 2×169121648640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 169121648640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198266454 + ... + 198267306.

Almost surely, 2^169121648640 is an apocalyptic number.

169121648640 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 169121648640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310247296128).

169121648640 is an abundant number, since it is smaller than the sum of its proper divisors (451372943616).

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

169121648640 is an equidigital number, since it uses as much as digits as its factorization.

169121648640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 169121648640 in words is "one hundred sixty-nine billion, one hundred twenty-one million, six hundred forty-eight thousand, six hundred forty".