15516320011 has 4 divisors (see below), whose sum is σ = 15517351872. Its totient is φ = 15515288152.

The previous prime is 15516319997. The next prime is 15516320023. The reversal of 15516320011 is 11002361551.

It is a happy number.

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 15516320011 - 2¹⁷ = 15516188939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15516320041) 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, 493036 + ... + 523561.

It is an arithmetic number, because the mean of its divisors is an integer number (3879337968).

Almost surely, 2^15516320011 is an apocalyptic number.

15516320011 is a deficient number, since it is larger than the sum of its proper divisors (1031861).

15516320011 is a wasteful number, since it uses less digits than its factorization.

15516320011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031860.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 15516320011 its reverse (11002361551), we get a palindrome (26518681562).

The spelling of 15516320011 in words is "fifteen billion, five hundred sixteen million, three hundred twenty thousand, eleven".