2656916405 has 16 divisors (see below), whose sum is σ = 3745695744. Its totient is φ = 1783663680.

The previous prime is 2656916401. The next prime is 2656916407. The reversal of 2656916405 is 5046196562.

It is not a de Polignac number, because 2656916405 - 2² = 2656916401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656916401) 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, 1857269 + ... + 1858698.

It is an arithmetic number, because the mean of its divisors is an integer number (234105984).

Almost surely, 2^2656916405 is an apocalyptic number.

It is an amenable number.

2656916405 is a deficient number, since it is larger than the sum of its proper divisors (1088779339).

2656916405 is a wasteful number, since it uses less digits than its factorization.

2656916405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715996.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 2656916405 is about 51545.2849929070. The cubic root of 2656916405 is about 1385.0303711621.

The spelling of 2656916405 in words is "two billion, six hundred fifty-six million, nine hundred sixteen thousand, four hundred five".