643116060455 has 16 divisors (see below), whose sum is σ = 842419449504. Its totient is φ = 467430737280.

The previous prime is 643116060451. The next prime is 643116060467. The reversal of 643116060455 is 554060611346.

It is not a de Polignac number, because 643116060455 - 2² = 643116060451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643116060451) 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, 3535904 + ... + 3713333.

It is an arithmetic number, because the mean of its divisors is an integer number (52651215594).

Almost surely, 2^643116060455 is an apocalyptic number.

643116060455 is a deficient number, since it is larger than the sum of its proper divisors (199303389049).

643116060455 is a wasteful number, since it uses less digits than its factorization.

643116060455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250866.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 643116060455 in words is "six hundred forty-three billion, one hundred sixteen million, sixty thousand, four hundred fifty-five".