163505255460 has 288 divisors, whose sum is σ = 485813220480. Its totient is φ = 41065390080.

The previous prime is 163505255371. The next prime is 163505255491. The reversal of 163505255460 is 64552505361.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 390227131 + ... + 390227549.

It is an arithmetic number, because the mean of its divisors is an integer number (1686851460).

Almost surely, 2^163505255460 is an apocalyptic number.

163505255460 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 163505255460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242906610240).

163505255460 is an abundant number, since it is smaller than the sum of its proper divisors (322307965020).

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

163505255460 is a wasteful number, since it uses less digits than its factorization.

163505255460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 163505255460 in words is "one hundred sixty-three billion, five hundred five million, two hundred fifty-five thousand, four hundred sixty".