15990336001 has 4 divisors (see below), whose sum is σ = 15994736212. Its totient is φ = 15985935792.

The previous prime is 15990335993. The next prime is 15990336007. The reversal of 15990336001 is 10063309951.

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 1169708401 + 14820627600 = 34201^2 + 121740^2 .

It is a cyclic number.

It is not a de Polignac number, because 15990336001 - 2³ = 15990335993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15990336007) 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, 2194650 + ... + 2201923.

It is an arithmetic number, because the mean of its divisors is an integer number (3998684053).

Almost surely, 2^15990336001 is an apocalyptic number.

It is an amenable number.

15990336001 is a deficient number, since it is larger than the sum of its proper divisors (4400211).

15990336001 is an equidigital number, since it uses as much as digits as its factorization.

15990336001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400210.

The product of its (nonzero) digits is 21870, while the sum is 37.

The spelling of 15990336001 in words is "fifteen billion, nine hundred ninety million, three hundred thirty-six thousand, one".