143645501055521 has 8 divisors (see below), whose sum is σ = 144068557490088. Its totient is φ = 143222767200000.

The previous prime is 143645501055509. The next prime is 143645501055569. The reversal of 143645501055521 is 125550105546341.

It can be written as a sum of positive squares in 4 ways, for example, as 82015464825121 + 61630036230400 = 9056239^2 + 7850480^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 143645501055521 - 2³⁰ = 143644427313697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143645501054521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79752830 + ... + 81534071.

It is an arithmetic number, because the mean of its divisors is an integer number (18008569686261).

Almost surely, 2^{143645501055521} is an apocalyptic number.

It is an amenable number.

143645501055521 is a deficient number, since it is larger than the sum of its proper divisors (423056434567).

143645501055521 is a wasteful number, since it uses less digits than its factorization.

143645501055521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161289523.

The product of its (nonzero) digits is 1800000, while the sum is 47.

The spelling of 143645501055521 in words is "one hundred forty-three trillion, six hundred forty-five billion, five hundred one million, fifty-five thousand, five hundred twenty-one".