505602615561 has 4 divisors (see below), whose sum is σ = 674136820752. Its totient is φ = 337068410372.

The previous prime is 505602615509. The next prime is 505602615587. The reversal of 505602615561 is 165516206505.

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 505602615561 - 2⁷ = 505602615433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505602605561) 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, 84267102591 + ... + 84267102596.

It is an arithmetic number, because the mean of its divisors is an integer number (168534205188).

Almost surely, 2^505602615561 is an apocalyptic number.

It is an amenable number.

505602615561 is a deficient number, since it is larger than the sum of its proper divisors (168534205191).

505602615561 is a wasteful number, since it uses less digits than its factorization.

505602615561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168534205190.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 505602615561 in words is "five hundred five billion, six hundred two million, six hundred fifteen thousand, five hundred sixty-one".