505638501 has 16 divisors (see below), whose sum is σ = 683471040. Its totient is φ = 332478720.

The previous prime is 505638487. The next prime is 505638541. The reversal of 505638501 is 105836505.

It is not a de Polignac number, because 505638501 - 2⁷ = 505638373 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505638541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67995 + ... + 75063.

It is an arithmetic number, because the mean of its divisors is an integer number (42716940).

Almost surely, 2^505638501 is an apocalyptic number.

It is an amenable number.

505638501 is a deficient number, since it is larger than the sum of its proper divisors (177832539).

505638501 is a wasteful number, since it uses less digits than its factorization.

505638501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 505638501 is about 22486.4070273577. The cubic root of 505638501 is about 796.6729014721.

The spelling of 505638501 in words is "five hundred five million, six hundred thirty-eight thousand, five hundred one".