2155068768 has 48 divisors (see below), whose sum is σ = 5954800320. Its totient is φ = 680547456.

The previous prime is 2155068761. The next prime is 2155068781. The reversal of 2155068768 is 8678605512.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155068761) 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, 588930 + ... + 592577.

It is an arithmetic number, because the mean of its divisors is an integer number (124058340).

Almost surely, 2^2155068768 is an apocalyptic number.

It is an amenable number.

2155068768 is an abundant number, since it is smaller than the sum of its proper divisors (3799731552).

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

2155068768 is a wasteful number, since it uses less digits than its factorization.

2155068768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181539 (or 1181531 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 2155068768 is about 46422.7182314866. The cubic root of 2155068768 is about 1291.6763591716.

The spelling of 2155068768 in words is "two billion, one hundred fifty-five million, sixty-eight thousand, seven hundred sixty-eight".