16605471261 has 16 divisors (see below), whose sum is σ = 22245402816. Its totient is φ = 11017969536.

The previous prime is 16605471251. The next prime is 16605471263. The reversal of 16605471261 is 16217450661.

It is a de Polignac number, because none of the positive numbers 2^k-16605471261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16605471263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2354206 + ... + 2361248.

It is an arithmetic number, because the mean of its divisors is an integer number (1390337676).

Almost surely, 2^16605471261 is an apocalyptic number.

It is an amenable number.

16605471261 is a deficient number, since it is larger than the sum of its proper divisors (5639931555).

16605471261 is a wasteful number, since it uses less digits than its factorization.

16605471261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10652.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 16605471261 in words is "sixteen billion, six hundred five million, four hundred seventy-one thousand, two hundred sixty-one".