1011857571539 has 2 divisors, whose sum is σ = 1011857571540. Its totient is φ = 1011857571538.

The previous prime is 1011857571503. The next prime is 1011857571541. The reversal of 1011857571539 is 9351757581101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011857571539 - 2¹⁶ = 1011857506003 is a prime.

Together with 1011857571541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1011857576539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505928785769 + 505928785770.

It is an arithmetic number, because the mean of its divisors is an integer number (505928785770).

Almost surely, 2^{1011857571539} is an apocalyptic number.

1011857571539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011857571539 is an equidigital number, since it uses as much as digits as its factorization.

1011857571539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1323000, while the sum is 53.

The spelling of 1011857571539 in words is "one trillion, eleven billion, eight hundred fifty-seven million, five hundred seventy-one thousand, five hundred thirty-nine".