2540231709309 has 12 divisors (see below), whose sum is σ = 4193398377376. Its totient is φ = 1451560976712.

The previous prime is 2540231709299. The next prime is 2540231709343. The reversal of 2540231709309 is 9039071320452.

2540231709309 is a `hidden beast` number, since 2 + 5 + 40 + 231 + 70 + 9 + 309 = 666.

It is not a de Polignac number, because 2540231709309 - 2¹⁶ = 2540231643773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540231709359) 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, 20160569059 + ... + 20160569184.

Almost surely, 2^{2540231709309} is an apocalyptic number.

It is an amenable number.

2540231709309 is a deficient number, since it is larger than the sum of its proper divisors (1653166668067).

2540231709309 is a wasteful number, since it uses less digits than its factorization.

2540231709309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40321138256 (or 40321138253 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 2540231709309 in words is "two trillion, five hundred forty billion, two hundred thirty-one million, seven hundred nine thousand, three hundred nine".