499999636499893 has 8 divisors (see below), whose sum is σ = 500668888118616. Its totient is φ = 499330824748800.

The previous prime is 499999636499887. The next prime is 499999636499899. The reversal of 499999636499893 is 398994636999994.

It is an interprime number because it is at equal distance from previous prime (499999636499887) and next prime (499999636499899).

It can be written as a sum of positive squares in 4 ways, for example, as 390538304009764 + 109461332490129 = 19762042^2 + 10462377^2 .

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 499999636499893 - 2¹³ = 499999636491701 is a prime.

It is a super-2 number, since 2×499999636499893² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499999636499899) 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, 107691946 + ... + 112238827.

It is an arithmetic number, because the mean of its divisors is an integer number (62583611014827).

Almost surely, 2^{499999636499893} is an apocalyptic number.

It is an amenable number.

499999636499893 is a deficient number, since it is larger than the sum of its proper divisors (669251618723).

499999636499893 is a wasteful number, since it uses less digits than its factorization.

499999636499893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219933815.

The product of its digits is 1785233613312, while the sum is 106.

The spelling of 499999636499893 in words is "four hundred ninety-nine trillion, nine hundred ninety-nine billion, six hundred thirty-six million, four hundred ninety-nine thousand, eight hundred ninety-three".