168902061440 has 128 divisors (see below), whose sum is σ = 462001492800. Its totient is φ = 57841901568.

The previous prime is 168902061413. The next prime is 168902061457. The reversal of 168902061440 is 44160209861.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3907466 + ... + 3950454.

Almost surely, 2^168902061440 is an apocalyptic number.

168902061440 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 168902061440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231000746400).

168902061440 is an abundant number, since it is smaller than the sum of its proper divisors (293099431360).

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

168902061440 is an equidigital number, since it uses as much as digits as its factorization.

168902061440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43892 (or 43880 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 168902061440 in words is "one hundred sixty-eight billion, nine hundred two million, sixty-one thousand, four hundred forty".