2054278791 has 24 divisors (see below), whose sum is σ = 3020160000. Its totient is φ = 1345295952.

The previous prime is 2054278789. The next prime is 2054278817. The reversal of 2054278791 is 1978724502.

It is a happy number.

2054278791 is a `hidden beast` number, since 20 + 542 + 7 + 87 + 9 + 1 = 666.

It is not a de Polignac number, because 2054278791 - 2¹ = 2054278789 is a prime.

It is a super-2 number, since 2×2054278791² = 8440122702304843362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2054278091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134230 + ... + 148748.

It is an arithmetic number, because the mean of its divisors is an integer number (125840000).

Almost surely, 2^2054278791 is an apocalyptic number.

2054278791 is a deficient number, since it is larger than the sum of its proper divisors (965881209).

2054278791 is a wasteful number, since it uses less digits than its factorization.

2054278791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14803 (or 14800 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 2054278791 is about 45324.1524024443. The cubic root of 2054278791 is about 1271.2172987530.

The spelling of 2054278791 in words is "two billion, fifty-four million, two hundred seventy-eight thousand, seven hundred ninety-one".