505444121335145 has 32 divisors (see below), whose sum is σ = 617198034752640. Its totient is φ = 397253829772800.

The previous prime is 505444121335133. The next prime is 505444121335147. The reversal of 505444121335145 is 541533121444505.

It is not a de Polignac number, because 505444121335145 - 2¹⁰ = 505444121334121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505444121335145.

It is not an unprimeable number, because it can be changed into a prime (505444121335147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7199921045 + ... + 7199991245.

It is an arithmetic number, because the mean of its divisors is an integer number (19287438586020).

Almost surely, 2^{505444121335145} is an apocalyptic number.

It is an amenable number.

505444121335145 is a deficient number, since it is larger than the sum of its proper divisors (111753913417495).

505444121335145 is a wasteful number, since it uses less digits than its factorization.

505444121335145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85145.

The product of its (nonzero) digits is 2880000, while the sum is 47.

The spelling of 505444121335145 in words is "five hundred five trillion, four hundred forty-four billion, one hundred twenty-one million, three hundred thirty-five thousand, one hundred forty-five".