499999636499979 has 32 divisors (see below), whose sum is σ = 832460868255744. Its totient is φ = 259336120488480.

The previous prime is 499999636499977. The next prime is 499999636499983. The reversal of 499999636499979 is 979994636999994.

It is not a de Polignac number, because 499999636499979 - 2¹ = 499999636499977 is a prime.

It is a super-2 number, since 2×499999636499979² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (499999636499977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1682977899 + ... + 1683274964.

It is an arithmetic number, because the mean of its divisors is an integer number (26014402132992).

Almost surely, 2^{499999636499979} is an apocalyptic number.

499999636499979 is a deficient number, since it is larger than the sum of its proper divisors (332461231755765).

499999636499979 is a wasteful number, since it uses less digits than its factorization.

499999636499979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366253527.

The product of its digits is 4686238234944, while the sum is 111.

The spelling of 499999636499979 in words is "four hundred ninety-nine trillion, nine hundred ninety-nine billion, six hundred thirty-six million, four hundred ninety-nine thousand, nine hundred seventy-nine".