1540250132857 has 2 divisors, whose sum is σ = 1540250132858. Its totient is φ = 1540250132856.

The previous prime is 1540250132843. The next prime is 1540250132879. The reversal of 1540250132857 is 7582310520451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 807546660496 + 732703472361 = 898636^2 + 855981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540250132857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1540250132807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770125066428 + 770125066429.

It is an arithmetic number, because the mean of its divisors is an integer number (770125066429).

Almost surely, 2^{1540250132857} is an apocalyptic number.

It is an amenable number.

1540250132857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540250132857 is an equidigital number, since it uses as much as digits as its factorization.

1540250132857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 1540250132857 in words is "one trillion, five hundred forty billion, two hundred fifty million, one hundred thirty-two thousand, eight hundred fifty-seven".