641724542105145 has 8 divisors (see below), whose sum is σ = 1026759267368256. Its totient is φ = 342253089122736.

The previous prime is 641724542105099. The next prime is 641724542105183. The reversal of 641724542105145 is 541501245427146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641724542105145 - 2⁸ = 641724542104889 is a prime.

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, 21390818070157 + ... + 21390818070186.

It is an arithmetic number, because the mean of its divisors is an integer number (128344908421032).

Almost surely, 2^{641724542105145} is an apocalyptic number.

It is an amenable number.

641724542105145 is a deficient number, since it is larger than the sum of its proper divisors (385034725263111).

641724542105145 is a wasteful number, since it uses less digits than its factorization.

641724542105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42781636140351.

The product of its (nonzero) digits is 5376000, while the sum is 51.

The spelling of 641724542105145 in words is "six hundred forty-one trillion, seven hundred twenty-four billion, five hundred forty-two million, one hundred five thousand, one hundred forty-five".