1540320344293 has 2 divisors, whose sum is σ = 1540320344294. Its totient is φ = 1540320344292.

The previous prime is 1540320344239. The next prime is 1540320344389. The reversal of 1540320344293 is 3924430230451.

It is a happy number.

Together with previous prime (1540320344239) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1124653887009 + 415666457284 = 1060497^2 + 644722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540320344293 - 2²⁹ = 1539783473381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540320344993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770160172146 + 770160172147.

It is an arithmetic number, because the mean of its divisors is an integer number (770160172147).

Almost surely, 2^{1540320344293} is an apocalyptic number.

It is an amenable number.

1540320344293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540320344293 is an equidigital number, since it uses as much as digits as its factorization.

1540320344293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 1540320344293 in words is "one trillion, five hundred forty billion, three hundred twenty million, three hundred forty-four thousand, two hundred ninety-three".