1250157317557 has 2 divisors, whose sum is σ = 1250157317558. Its totient is φ = 1250157317556.

The previous prime is 1250157317503. The next prime is 1250157317569. The reversal of 1250157317557 is 7557137510521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734850130756 + 515307186801 = 857234^2 + 717849^2 .

It is an emirp because it is prime and its reverse (7557137510521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1250157317557 - 2²³ = 1250148928949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1250157317557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250157312557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625078658778 + 625078658779.

It is an arithmetic number, because the mean of its divisors is an integer number (625078658779).

Almost surely, 2^{1250157317557} is an apocalyptic number.

It is an amenable number.

1250157317557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250157317557 is an equidigital number, since it uses as much as digits as its factorization.

1250157317557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1286250, while the sum is 49.

The spelling of 1250157317557 in words is "one trillion, two hundred fifty billion, one hundred fifty-seven million, three hundred seventeen thousand, five hundred fifty-seven".