1540655713 has 4 divisors (see below), whose sum is σ = 1607640768. Its totient is φ = 1473670660.

The previous prime is 1540655707. The next prime is 1540655737. The reversal of 1540655713 is 3175560451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1540655713 - 2¹⁷ = 1540524641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540655773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33492493 + ... + 33492538.

It is an arithmetic number, because the mean of its divisors is an integer number (401910192).

Almost surely, 2^1540655713 is an apocalyptic number.

It is an amenable number.

1540655713 is a deficient number, since it is larger than the sum of its proper divisors (66985055).

1540655713 is an equidigital number, since it uses as much as digits as its factorization.

1540655713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66985054.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 1540655713 is about 39251.1874087906. The cubic root of 1540655713 is about 1154.9642269487.

The spelling of 1540655713 in words is "one billion, five hundred forty million, six hundred fifty-five thousand, seven hundred thirteen".