23791989985 has 8 divisors (see below), whose sum is σ = 28672923240. Its totient is φ = 18951901824.

The previous prime is 23791989979. The next prime is 23791989989. The reversal of 23791989985 is 58998919732.

It can be written as a sum of positive squares in 4 ways, for example, as 58430736 + 23733559249 = 7644^2 + 154057^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23791989985 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23791989989) 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 7 ways as a sum of consecutive naturals, for example, 10209990 + ... + 10212319.

It is an arithmetic number, because the mean of its divisors is an integer number (3584115405).

Almost surely, 2^23791989985 is an apocalyptic number.

It is an amenable number.

23791989985 is a deficient number, since it is larger than the sum of its proper divisors (4880933255).

23791989985 is a wasteful number, since it uses less digits than its factorization.

23791989985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20422547.

The product of its digits is 88179840, while the sum is 70.

The spelling of 23791989985 in words is "twenty-three billion, seven hundred ninety-one million, nine hundred eighty-nine thousand, nine hundred eighty-five".