501380685145 has 4 divisors (see below), whose sum is σ = 601656822180. Its totient is φ = 401104548112.

The previous prime is 501380685139. The next prime is 501380685149. The reversal of 501380685145 is 541586083105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541586083105 = 5 ⋅108317216621.

It can be written as a sum of positive squares in 2 ways, for example, as 247791897369 + 253588787776 = 497787^2 + 503576^2 .

It is a cyclic number.

It is not a de Polignac number, because 501380685145 - 2¹⁹ = 501380160857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 501380685095 and 501380685104.

It is not an unprimeable number, because it can be changed into a prime (501380685149) 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, 50138068510 + ... + 50138068519.

It is an arithmetic number, because the mean of its divisors is an integer number (150414205545).

Almost surely, 2^501380685145 is an apocalyptic number.

It is an amenable number.

501380685145 is a deficient number, since it is larger than the sum of its proper divisors (100276137035).

501380685145 is a wasteful number, since it uses less digits than its factorization.

501380685145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100276137034.

The product of its (nonzero) digits is 576000, while the sum is 46.

The spelling of 501380685145 in words is "five hundred one billion, three hundred eighty million, six hundred eighty-five thousand, one hundred forty-five".