505561143461 has 4 divisors (see below), whose sum is σ = 551521247424. Its totient is φ = 459601039500.

The previous prime is 505561143457. The next prime is 505561143469. The reversal of 505561143461 is 164341165505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505561143461 - 2² = 505561143457 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 (505561143469) 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, 22980051965 + ... + 22980051986.

It is an arithmetic number, because the mean of its divisors is an integer number (137880311856).

Almost surely, 2^505561143461 is an apocalyptic number.

It is an amenable number.

505561143461 is a deficient number, since it is larger than the sum of its proper divisors (45960103963).

505561143461 is a wasteful number, since it uses less digits than its factorization.

505561143461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45960103962.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 505561143461 in words is "five hundred five billion, five hundred sixty-one million, one hundred forty-three thousand, four hundred sixty-one".