2116401656 has 16 divisors (see below), whose sum is σ = 3970185840. Its totient is φ = 1057685440.

The previous prime is 2116401653. The next prime is 2116401691. The reversal of 2116401656 is 6561046112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116401653) 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 3 ways as a sum of consecutive naturals, for example, 46685 + ... + 80076.

It is an arithmetic number, because the mean of its divisors is an integer number (248136615).

Almost surely, 2^2116401656 is an apocalyptic number.

It is an amenable number.

2116401656 is a deficient number, since it is larger than the sum of its proper divisors (1853784184).

2116401656 is a wasteful number, since it uses less digits than its factorization.

2116401656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128854 (or 128850 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2116401656 is about 46004.3656189279. The cubic root of 2116401656 is about 1283.9044306026.

Adding to 2116401656 its reverse (6561046112), we get a palindrome (8677447768).

The spelling of 2116401656 in words is "two billion, one hundred sixteen million, four hundred one thousand, six hundred fifty-six".