16001488985 has 4 divisors (see below), whose sum is σ = 19201786788. Its totient is φ = 12801191184.

The previous prime is 16001488927. The next prime is 16001488991. The reversal of 16001488985 is 58988410061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3890266384 + 12111222601 = 62372^2 + 110051^2 .

It is a cyclic number.

It is not a de Polignac number, because 16001488985 - 2³² = 11706521689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600148894 + ... + 1600148903.

It is an arithmetic number, because the mean of its divisors is an integer number (4800446697).

Almost surely, 2^16001488985 is an apocalyptic number.

It is an amenable number.

16001488985 is a deficient number, since it is larger than the sum of its proper divisors (3200297803).

16001488985 is an equidigital number, since it uses as much as digits as its factorization.

16001488985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200297802.

The product of its (nonzero) digits is 552960, while the sum is 50.

The spelling of 16001488985 in words is "sixteen billion, one million, four hundred eighty-eight thousand, nine hundred eighty-five".