143472111991 has 32 divisors (see below), whose sum is σ = 163560902400. Its totient is φ = 124757418240.

The previous prime is 143472111973. The next prime is 143472111997. The reversal of 143472111991 is 199111274341.

It is not a de Polignac number, because 143472111991 - 2⁹ = 143472111479 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 (143472111997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37963740 + ... + 37967518.

It is an arithmetic number, because the mean of its divisors is an integer number (5111278200).

Almost surely, 2^143472111991 is an apocalyptic number.

143472111991 is a deficient number, since it is larger than the sum of its proper divisors (20088790409).

143472111991 is a wasteful number, since it uses less digits than its factorization.

143472111991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639.

The product of its digits is 54432, while the sum is 43.

The spelling of 143472111991 in words is "one hundred forty-three billion, four hundred seventy-two million, one hundred eleven thousand, nine hundred ninety-one".