2143985615939 has 4 divisors (see below), whose sum is σ = 2143989814080. Its totient is φ = 2143981417800.

The previous prime is 2143985615903. The next prime is 2143985616001. The reversal of 2143985615939 is 9395165893412.

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

It is a cyclic number.

It is not a de Polignac number, because 2143985615939 - 2¹² = 2143985611843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143985615039) 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, 1206512 + ... + 2396589.

It is an arithmetic number, because the mean of its divisors is an integer number (535997453520).

Almost surely, 2^{2143985615939} is an apocalyptic number.

2143985615939 is a deficient number, since it is larger than the sum of its proper divisors (4198141).

2143985615939 is an equidigital number, since it uses as much as digits as its factorization.

2143985615939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198140.

The product of its digits is 62985600, while the sum is 65.

The spelling of 2143985615939 in words is "two trillion, one hundred forty-three billion, nine hundred eighty-five million, six hundred fifteen thousand, nine hundred thirty-nine".