2540409069 has 8 divisors (see below), whose sum is σ = 3695140512. Its totient is φ = 1539641840.

The previous prime is 2540409043. The next prime is 2540409071. The reversal of 2540409069 is 9609040452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2540409069 - 2⁹ = 2540408557 is a prime.

It is a super-2 number, since 2×2540409069² = 12907356475714893522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540409089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38491014 + ... + 38491079.

It is an arithmetic number, because the mean of its divisors is an integer number (461892564).

Almost surely, 2^2540409069 is an apocalyptic number.

It is an amenable number.

2540409069 is a deficient number, since it is larger than the sum of its proper divisors (1154731443).

2540409069 is a wasteful number, since it uses less digits than its factorization.

2540409069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76982107.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 2540409069 is about 50402.4708620520. The cubic root of 2540409069 is about 1364.4822322115.

The spelling of 2540409069 in words is "two billion, five hundred forty million, four hundred nine thousand, sixty-nine".