143920945991 has 8 divisors (see below), whose sum is σ = 151366644864. Its totient is φ = 136650440160.

The previous prime is 143920945981. The next prime is 143920946003. The reversal of 143920945991 is 199549029341.

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 143920945991 - 2¹⁸ = 143920683847 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 (143920945921) 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, 43796576 + ... + 43799861.

It is an arithmetic number, because the mean of its divisors is an integer number (18920830608).

Almost surely, 2^143920945991 is an apocalyptic number.

143920945991 is a deficient number, since it is larger than the sum of its proper divisors (7445698873).

143920945991 is an equidigital number, since it uses as much as digits as its factorization.

143920945991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87596521.

The product of its (nonzero) digits is 3149280, while the sum is 56.

The spelling of 143920945991 in words is "one hundred forty-three billion, nine hundred twenty million, nine hundred forty-five thousand, nine hundred ninety-one".