2111161455 has 64 divisors (see below), whose sum is σ = 4118325120. Its totient is φ = 1019685888.

The previous prime is 2111161453. The next prime is 2111161469. The reversal of 2111161455 is 5541611112.

It is not a de Polignac number, because 2111161455 - 2¹ = 2111161453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111161453) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81667 + ... + 104363.

It is an arithmetic number, because the mean of its divisors is an integer number (64348830).

Almost surely, 2^2111161455 is an apocalyptic number.

2111161455 is a deficient number, since it is larger than the sum of its proper divisors (2007163665).

2111161455 is a wasteful number, since it uses less digits than its factorization.

2111161455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22777 (or 22771 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 2111161455 is about 45947.3770198039. The cubic root of 2111161455 is about 1282.8439076347.

Adding to 2111161455 its reverse (5541611112), we get a palindrome (7652772567).

The spelling of 2111161455 in words is "two billion, one hundred eleven million, one hundred sixty-one thousand, four hundred fifty-five".