505655156667 has 4 divisors (see below), whose sum is σ = 674206875560. Its totient is φ = 337103437776.

The previous prime is 505655156659. The next prime is 505655156683. The reversal of 505655156667 is 766651556505.

It is a happy number.

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

It is not a de Polignac number, because 505655156667 - 2³ = 505655156659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505655156267) 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, 84275859442 + ... + 84275859447.

It is an arithmetic number, because the mean of its divisors is an integer number (168551718890).

Almost surely, 2^505655156667 is an apocalyptic number.

505655156667 is a deficient number, since it is larger than the sum of its proper divisors (168551718893).

505655156667 is a wasteful number, since it uses less digits than its factorization.

505655156667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168551718892.

The product of its (nonzero) digits is 28350000, while the sum is 57.

The spelling of 505655156667 in words is "five hundred five billion, six hundred fifty-five million, one hundred fifty-six thousand, six hundred sixty-seven".