505508619797 has 4 divisors (see below), whose sum is σ = 506282753100. Its totient is φ = 504734486496.

The previous prime is 505508619779. The next prime is 505508619799. The reversal of 505508619797 is 797916805505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137058405796 + 368450214001 = 370214^2 + 607001^2 .

It is a cyclic number.

It is not a de Polignac number, because 505508619797 - 2¹⁰ = 505508618773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505508619799) 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, 387065672 + ... + 387066977.

It is an arithmetic number, because the mean of its divisors is an integer number (126570688275).

Almost surely, 2^505508619797 is an apocalyptic number.

It is an amenable number.

505508619797 is a deficient number, since it is larger than the sum of its proper divisors (774133303).

505508619797 is an equidigital number, since it uses as much as digits as its factorization.

505508619797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774133302.

The product of its (nonzero) digits is 23814000, while the sum is 62.

The spelling of 505508619797 in words is "five hundred five billion, five hundred eight million, six hundred nineteen thousand, seven hundred ninety-seven".