143643064121461 has 4 divisors (see below), whose sum is σ = 144914241680172. Its totient is φ = 142371886562752.

The previous prime is 143643064121441. The next prime is 143643064121477. The reversal of 143643064121461 is 164121460346341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9587631032100 + 134055433089361 = 3096390^2 + 11578231^2 .

It is a cyclic number.

It is not a de Polignac number, because 143643064121461 - 2³³ = 143634474186869 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 (143643064121441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635588779186 + ... + 635588779411.

It is an arithmetic number, because the mean of its divisors is an integer number (36228560420043).

Almost surely, 2^{143643064121461} is an apocalyptic number.

It is an amenable number.

143643064121461 is a deficient number, since it is larger than the sum of its proper divisors (1271177558711).

143643064121461 is a wasteful number, since it uses less digits than its factorization.

143643064121461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271177558710.

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 143643064121461 in words is "one hundred forty-three trillion, six hundred forty-three billion, sixty-four million, one hundred twenty-one thousand, four hundred sixty-one".