163951486020 has 720 divisors, whose sum is σ = 657519730560. Its totient is φ = 33401217024.

The previous prime is 163951486009. The next prime is 163951486031. The reversal of 163951486020 is 20684159361.

163951486020 is a `hidden beast` number, since 1 + 6 + 39 + 5 + 1 + 4 + 8 + 602 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (163951486009) and next prime (163951486031).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 62266624 + ... + 62269256.

It is an arithmetic number, because the mean of its divisors is an integer number (913221848).

Almost surely, 2^163951486020 is an apocalyptic number.

163951486020 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 163951486020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328759865280).

163951486020 is an abundant number, since it is smaller than the sum of its proper divisors (493568244540).

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

163951486020 is a wasteful number, since it uses less digits than its factorization.

163951486020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714 (or 2686 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 163951486020 in words is "one hundred sixty-three billion, nine hundred fifty-one million, four hundred eighty-six thousand, twenty".