643011334542 has 48 divisors (see below), whose sum is σ = 1466632677120. Its totient is φ = 203040205200.

The previous prime is 643011334517. The next prime is 643011334571. The reversal of 643011334542 is 245433110346.

643011334542 is a `hidden beast` number, since 6 + 4 + 301 + 1 + 3 + 345 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 643011334497 and 643011334506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4724667 + ... + 4858857.

It is an arithmetic number, because the mean of its divisors is an integer number (30554847440).

Almost surely, 2^643011334542 is an apocalyptic number.

643011334542 is an abundant number, since it is smaller than the sum of its proper divisors (823621342578).

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

643011334542 is a wasteful number, since it uses less digits than its factorization.

643011334542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148229 (or 148226 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 643011334542 its reverse (245433110346), we get a palindrome (888444444888).

The spelling of 643011334542 in words is "six hundred forty-three billion, eleven million, three hundred thirty-four thousand, five hundred forty-two".