155513001563 has 2 divisors, whose sum is σ = 155513001564. Its totient is φ = 155513001562.

The previous prime is 155513001529. The next prime is 155513001569. The reversal of 155513001563 is 365100315551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155513001563 - 2¹² = 155512997467 is a prime.

It is not a weakly prime, because it can be changed into another prime (155513001569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77756500781 + 77756500782.

It is an arithmetic number, because the mean of its divisors is an integer number (77756500782).

Almost surely, 2^155513001563 is an apocalyptic number.

155513001563 is a deficient number, since it is larger than the sum of its proper divisors (1).

155513001563 is an equidigital number, since it uses as much as digits as its factorization.

155513001563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 35.

The spelling of 155513001563 in words is "one hundred fifty-five billion, five hundred thirteen million, one thousand, five hundred sixty-three".