2155716416 has 56 divisors (see below), whose sum is σ = 5176454976. Its totient is φ = 869529600.

The previous prime is 2155716373. The next prime is 2155716419. The reversal of 2155716416 is 6146175512.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×2155716416² = 9294226532423770112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2155716416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155716419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133910 + ... + 149141.

It is an arithmetic number, because the mean of its divisors is an integer number (92436696).

Almost surely, 2^2155716416 is an apocalyptic number.

It is an amenable number.

2155716416 is an abundant number, since it is smaller than the sum of its proper divisors (3020738560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155716416 is a wasteful number, since it uses less digits than its factorization.

2155716416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283087 (or 283077 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 2155716416 is about 46429.6932576557. The cubic root of 2155716416 is about 1291.8057390837.

It can be divided in two parts, 21557 and 16416, that added together give a palindrome (37973).

The spelling of 2155716416 in words is "two billion, one hundred fifty-five million, seven hundred sixteen thousand, four hundred sixteen".