2540777931 has 12 divisors (see below), whose sum is σ = 3670685200. Its totient is φ = 1693541520.

The previous prime is 2540777923. The next prime is 2540777933. The reversal of 2540777931 is 1397770452.

2540777931 is a `hidden beast` number, since 2 + 540 + 7 + 7 + 79 + 31 = 666.

It is not a de Polignac number, because 2540777931 - 2³ = 2540777923 is a prime.

It is a super-2 number, since 2×2540777931² = 12911104989313281522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540777933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33021 + ... + 78561.

Almost surely, 2^2540777931 is an apocalyptic number.

2540777931 is a deficient number, since it is larger than the sum of its proper divisors (1129907269).

2540777931 is a wasteful number, since it uses less digits than its factorization.

2540777931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51746 (or 51743 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The square root of 2540777931 is about 50406.1298950832. The cubic root of 2540777931 is about 1364.5482689893.

The spelling of 2540777931 in words is "two billion, five hundred forty million, seven hundred seventy-seven thousand, nine hundred thirty-one".