1643245507241 has 16 divisors (see below), whose sum is σ = 1776860817984. Its totient is φ = 1510666248384.

The previous prime is 1643245507219. The next prime is 1643245507247. The reversal of 1643245507241 is 1427055423461.

It is a cyclic number.

It is not a de Polignac number, because 1643245507241 - 2⁶ = 1643245507177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1643245507192 and 1643245507201.

It is not an unprimeable number, because it can be changed into a prime (1643245507247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6749075 + ... + 6988311.

It is an arithmetic number, because the mean of its divisors is an integer number (111053801124).

Almost surely, 2^{1643245507241} is an apocalyptic number.

It is an amenable number.

1643245507241 is a deficient number, since it is larger than the sum of its proper divisors (133615310743).

1643245507241 is a wasteful number, since it uses less digits than its factorization.

1643245507241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241400.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 1643245507241 in words is "one trillion, six hundred forty-three billion, two hundred forty-five million, five hundred seven thousand, two hundred forty-one".