643660605120152 has 64 divisors (see below), whose sum is σ = 1267321681533600. Its totient is φ = 306128310082560.

The previous prime is 643660605120149. The next prime is 643660605120163. The reversal of 643660605120152 is 251021506066346.

It is a junction number, because it is equal to n+sod(n) for n = 643660605120097 and 643660605120106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33110627 + ... + 48822482.

Almost surely, 2^{643660605120152} is an apocalyptic number.

It is an amenable number.

643660605120152 is a deficient number, since it is larger than the sum of its proper divisors (623661076413448).

643660605120152 is a wasteful number, since it uses less digits than its factorization.

643660605120152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81933756 (or 81933752 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 643660605120152 in words is "six hundred forty-three trillion, six hundred sixty billion, six hundred five million, one hundred twenty thousand, one hundred fifty-two".