643013146887 has 16 divisors (see below), whose sum is σ = 885047181312. Its totient is φ = 414828516960.

The previous prime is 643013146879. The next prime is 643013146921. The reversal of 643013146887 is 788641310346.

It is a happy number.

It is not a de Polignac number, because 643013146887 - 2³ = 643013146879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643013146847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2095578 + ... + 2382744.

It is an arithmetic number, because the mean of its divisors is an integer number (55315448832).

Almost surely, 2^643013146887 is an apocalyptic number.

643013146887 is a deficient number, since it is larger than the sum of its proper divisors (242034034425).

643013146887 is a wasteful number, since it uses less digits than its factorization.

643013146887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311278.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 643013146887 in words is "six hundred forty-three billion, thirteen million, one hundred forty-six thousand, eight hundred eighty-seven".