505991445761 has 8 divisors (see below), whose sum is σ = 507975276864. Its totient is φ = 504008069040.

The previous prime is 505991445733. The next prime is 505991445803. The reversal of 505991445761 is 167544199505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505991445761 - 2⁶ = 505991445697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505991445697 and 505991445706.

It is not an unprimeable number, because it can be changed into a prime (505991445061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2210870 + ... + 2428976.

It is an arithmetic number, because the mean of its divisors is an integer number (63496909608).

Almost surely, 2^505991445761 is an apocalyptic number.

It is an amenable number.

505991445761 is a deficient number, since it is larger than the sum of its proper divisors (1983831103).

505991445761 is a wasteful number, since it uses less digits than its factorization.

505991445761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227191.

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 505991445761 in words is "five hundred five billion, nine hundred ninety-one million, four hundred forty-five thousand, seven hundred sixty-one".