1555135005023 has 2 divisors, whose sum is σ = 1555135005024. Its totient is φ = 1555135005022.

The previous prime is 1555135005001. The next prime is 1555135005043. The reversal of 1555135005023 is 3205005315551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1555135005023 - 2¹² = 1555135000927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555135005043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777567502511 + 777567502512.

It is an arithmetic number, because the mean of its divisors is an integer number (777567502512).

Almost surely, 2^{1555135005023} is an apocalyptic number.

1555135005023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555135005023 is an equidigital number, since it uses as much as digits as its factorization.

1555135005023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56250, while the sum is 35.

The spelling of 1555135005023 in words is "one trillion, five hundred fifty-five billion, one hundred thirty-five million, five thousand, twenty-three".