643601316162136 has 32 divisors (see below), whose sum is σ = 1227260625037200. Its totient is φ = 316332302602240.

The previous prime is 643601316162089. The next prime is 643601316162173. The reversal of 643601316162136 is 631261613106346.

It is a self number, because there is not a number n which added to its sum of digits gives 643601316162136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19803505 + ... + 40980256.

Almost surely, 2^{643601316162136} is an apocalyptic number.

It is an amenable number.

643601316162136 is a deficient number, since it is larger than the sum of its proper divisors (583659308875064).

643601316162136 is a wasteful number, since it uses less digits than its factorization.

643601316162136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60806259 (or 60806255 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 49.

The spelling of 643601316162136 in words is "six hundred forty-three trillion, six hundred one billion, three hundred sixteen million, one hundred sixty-two thousand, one hundred thirty-six".