16511959093 has 12 divisors (see below), whose sum is σ = 19226883180. Its totient is φ = 14139038592.

The previous prime is 16511958973. The next prime is 16511959097. The reversal of 16511959093 is 39095911561.

It can be written as a sum of positive squares in 2 ways, for example, as 2140265169 + 14371693924 = 46263^2 + 119882^2 .

It is not a de Polignac number, because 16511959093 - 2¹³ = 16511950901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16511959097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117546 + ... + 216427.

It is an arithmetic number, because the mean of its divisors is an integer number (1602240265).

Almost surely, 2^16511959093 is an apocalyptic number.

It is an amenable number.

16511959093 is a deficient number, since it is larger than the sum of its proper divisors (2714924087).

16511959093 is a wasteful number, since it uses less digits than its factorization.

16511959093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334996 (or 334989 counting only the distinct ones).

The product of its (nonzero) digits is 328050, while the sum is 49.

The spelling of 16511959093 in words is "sixteen billion, five hundred eleven million, nine hundred fifty-nine thousand, ninety-three".