143354621461 has 4 divisors (see below), whose sum is σ = 148297884300. Its totient is φ = 138411358624.

The previous prime is 143354621441. The next prime is 143354621491. The reversal of 143354621461 is 164126453341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164126453341 = 571 ⋅287436871.

It can be written as a sum of positive squares in 2 ways, for example, as 86630148900 + 56724472561 = 294330^2 + 238169^2 .

It is a cyclic number.

It is not a de Polignac number, because 143354621461 - 2¹¹ = 143354619413 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 (143354621441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2471631376 + ... + 2471631433.

It is an arithmetic number, because the mean of its divisors is an integer number (37074471075).

Almost surely, 2^143354621461 is an apocalyptic number.

It is an amenable number.

143354621461 is a deficient number, since it is larger than the sum of its proper divisors (4943262839).

143354621461 is an equidigital number, since it uses as much as digits as its factorization.

143354621461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943262838.

The product of its digits is 207360, while the sum is 40.

The spelling of 143354621461 in words is "one hundred forty-three billion, three hundred fifty-four million, six hundred twenty-one thousand, four hundred sixty-one".