505640127729 has 8 divisors (see below), whose sum is σ = 735476549472. Its totient is φ = 306448562240.

The previous prime is 505640127709. The next prime is 505640127739. The reversal of 505640127729 is 927721046505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505640127729 - 2⁵ = 505640127697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505640127709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7661214024 + ... + 7661214089.

It is an arithmetic number, because the mean of its divisors is an integer number (91934568684).

Almost surely, 2^505640127729 is an apocalyptic number.

It is an amenable number.

505640127729 is a deficient number, since it is larger than the sum of its proper divisors (229836421743).

505640127729 is a wasteful number, since it uses less digits than its factorization.

505640127729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15322428127.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 505640127729 in words is "five hundred five billion, six hundred forty million, one hundred twenty-seven thousand, seven hundred twenty-nine".