2540730765 has 32 divisors (see below), whose sum is σ = 4266535680. Its totient is φ = 1288618496.

The previous prime is 2540730761. The next prime is 2540730769. The reversal of 2540730765 is 5670370452.

It is an interprime number because it is at equal distance from previous prime (2540730761) and next prime (2540730769).

It is a cyclic number.

It is not a de Polignac number, because 2540730765 - 2² = 2540730761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540730761) 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 31 ways as a sum of consecutive naturals, for example, 38401 + ... + 80969.

It is an arithmetic number, because the mean of its divisors is an integer number (133329240).

Almost surely, 2^2540730765 is an apocalyptic number.

It is an amenable number.

2540730765 is a deficient number, since it is larger than the sum of its proper divisors (1725804915).

2540730765 is a wasteful number, since it uses less digits than its factorization.

2540730765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42773.

The product of its (nonzero) digits is 176400, while the sum is 39.

The square root of 2540730765 is about 50405.6620331486. The cubic root of 2540730765 is about 1364.5398252917.

The spelling of 2540730765 in words is "two billion, five hundred forty million, seven hundred thirty thousand, seven hundred sixty-five".