163065611431240 has 128 divisors (see below), whose sum is σ = 420987180418560. Its totient is φ = 55685091170304.

The previous prime is 163065611431231. The next prime is 163065611431243. The reversal of 163065611431240 is 42134116560361.

It is a super-3 number, since 3×163065611431240³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (163065611431243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105120709 + ... + 106660651.

It is an arithmetic number, because the mean of its divisors is an integer number (3288962347020).

Almost surely, 2^{163065611431240} is an apocalyptic number.

163065611431240 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 163065611431240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210493590209280).

163065611431240 is an abundant number, since it is smaller than the sum of its proper divisors (257921568987320).

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

163065611431240 is a wasteful number, since it uses less digits than its factorization.

163065611431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541471 (or 1541467 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 163065611431240 in words is "one hundred sixty-three trillion, sixty-five billion, six hundred eleven million, four hundred thirty-one thousand, two hundred forty".