501545661260505 has 32 divisors (see below), whose sum is σ = 812544863961600. Its totient is φ = 264141567393792.

The previous prime is 501545661260503. The next prime is 501545661260513. The reversal of 501545661260505 is 505062166545105.

It is not a de Polignac number, because 501545661260505 - 2¹ = 501545661260503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501545661260503) 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, 243244929 + ... + 245298158.

It is an arithmetic number, because the mean of its divisors is an integer number (25392026998800).

Almost surely, 2^{501545661260505} is an apocalyptic number.

It is an amenable number.

501545661260505 is a deficient number, since it is larger than the sum of its proper divisors (310999202701095).

501545661260505 is a wasteful number, since it uses less digits than its factorization.

501545661260505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488543953.

The product of its (nonzero) digits is 5400000, while the sum is 51.

The spelling of 501545661260505 in words is "five hundred one trillion, five hundred forty-five billion, six hundred sixty-one million, two hundred sixty thousand, five hundred five".