505535145501 has 4 divisors (see below), whose sum is σ = 674046860672. Its totient is φ = 337023430332.

The previous prime is 505535145491. The next prime is 505535145539. The reversal of 505535145501 is 105541535505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 505535145501 - 2⁵ = 505535145469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505535145501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505535145001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84255857581 + ... + 84255857586.

It is an arithmetic number, because the mean of its divisors is an integer number (168511715168).

Almost surely, 2^505535145501 is an apocalyptic number.

It is an amenable number.

505535145501 is a deficient number, since it is larger than the sum of its proper divisors (168511715171).

505535145501 is a wasteful number, since it uses less digits than its factorization.

505535145501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168511715170.

The product of its (nonzero) digits is 187500, while the sum is 39.

The spelling of 505535145501 in words is "five hundred five billion, five hundred thirty-five million, one hundred forty-five thousand, five hundred one".