505405463621 has 4 divisors (see below), whose sum is σ = 532005751200. Its totient is φ = 478805176044.

The previous prime is 505405463587. The next prime is 505405463681. The reversal of 505405463621 is 126364504505.

It is a happy number.

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 505405463621 - 2¹⁴ = 505405447237 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 (505405463681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13300143761 + ... + 13300143798.

It is an arithmetic number, because the mean of its divisors is an integer number (133001437800).

Almost surely, 2^505405463621 is an apocalyptic number.

It is an amenable number.

505405463621 is a deficient number, since it is larger than the sum of its proper divisors (26600287579).

505405463621 is a wasteful number, since it uses less digits than its factorization.

505405463621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26600287578.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 505405463621 in words is "five hundred five billion, four hundred five million, four hundred sixty-three thousand, six hundred twenty-one".