494690489501 has 4 divisors (see below), whose sum is σ = 532743604092. Its totient is φ = 456637374912.

The previous prime is 494690489479. The next prime is 494690489569. The reversal of 494690489501 is 105984096494.

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 32059260601 + 462631228900 = 179051^2 + 680170^2 .

It is a cyclic number.

It is not a de Polignac number, because 494690489501 - 2²² = 494686295197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494690489101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19026557276 + ... + 19026557301.

It is an arithmetic number, because the mean of its divisors is an integer number (133185901023).

Almost surely, 2^494690489501 is an apocalyptic number.

It is an amenable number.

494690489501 is a deficient number, since it is larger than the sum of its proper divisors (38053114591).

494690489501 is a wasteful number, since it uses less digits than its factorization.

494690489501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38053114590.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 494690489501 in words is "four hundred ninety-four billion, six hundred ninety million, four hundred eighty-nine thousand, five hundred one".