643154036112 has 160 divisors (see below), whose sum is σ = 2111464540160. Its totient is φ = 183614843520.

The previous prime is 643154036099. The next prime is 643154036123. The reversal of 643154036112 is 211630451346.

643154036112 is a `hidden beast` number, since 6 + 4 + 31 + 5 + 4 + 0 + 3 + 611 + 2 = 666.

It is a super-2 number, since 2×643154036112² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3821613 + ... + 3986355.

It is an arithmetic number, because the mean of its divisors is an integer number (13196653376).

Almost surely, 2^643154036112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643154036112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055732270080).

643154036112 is an abundant number, since it is smaller than the sum of its proper divisors (1468310504048).

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

643154036112 is a wasteful number, since it uses less digits than its factorization.

643154036112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166058 (or 166046 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 643154036112 its reverse (211630451346), we get a palindrome (854784487458).

The spelling of 643154036112 in words is "six hundred forty-three billion, one hundred fifty-four million, thirty-six thousand, one hundred twelve".