1257145108619 has 2 divisors, whose sum is σ = 1257145108620. Its totient is φ = 1257145108618.

The previous prime is 1257145108591. The next prime is 1257145108663. The reversal of 1257145108619 is 9168015417521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1257145108619 - 2²⁰ = 1257144060043 is a prime.

It is a super-2 number, since 2×1257145108619² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1257145108669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628572554309 + 628572554310.

It is an arithmetic number, because the mean of its divisors is an integer number (628572554310).

Almost surely, 2^{1257145108619} is an apocalyptic number.

1257145108619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257145108619 is an equidigital number, since it uses as much as digits as its factorization.

1257145108619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 1257145108619 in words is "one trillion, two hundred fifty-seven billion, one hundred forty-five million, one hundred eight thousand, six hundred nineteen".