505551627157 has 4 divisors (see below), whose sum is σ = 505560616236. Its totient is φ = 505542638080.

The previous prime is 505551627143. The next prime is 505551627169. The reversal of 505551627157 is 751726155505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 233225248356 + 272326378801 = 482934^2 + 521849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505551627157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505551627157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505551627107) 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, 4409644 + ... + 4522837.

It is an arithmetic number, because the mean of its divisors is an integer number (126390154059).

Almost surely, 2^505551627157 is an apocalyptic number.

It is an amenable number.

505551627157 is a deficient number, since it is larger than the sum of its proper divisors (8989079).

505551627157 is an equidigital number, since it uses as much as digits as its factorization.

505551627157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8989078.

The product of its (nonzero) digits is 1837500, while the sum is 49.

The spelling of 505551627157 in words is "five hundred five billion, five hundred fifty-one million, six hundred twenty-seven thousand, one hundred fifty-seven".