2155796454 has 24 divisors (see below), whose sum is σ = 5015527128. Its totient is φ = 615941760.

The previous prime is 2155796437. The next prime is 2155796459. The reversal of 2155796454 is 4546975512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155796459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3666027 + ... + 3666614.

It is an arithmetic number, because the mean of its divisors is an integer number (208980297).

Almost surely, 2^2155796454 is an apocalyptic number.

2155796454 is an abundant number, since it is smaller than the sum of its proper divisors (2859730674).

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

2155796454 is a wasteful number, since it uses less digits than its factorization.

2155796454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332660 (or 7332653 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 48.

The square root of 2155796454 is about 46430.5551765214. Note that the first 3 decimals coincide. The cubic root of 2155796454 is about 1291.8217263857.

The spelling of 2155796454 in words is "two billion, one hundred fifty-five million, seven hundred ninety-six thousand, four hundred fifty-four".