499999636499980 has 48 divisors (see below), whose sum is σ = 1081830886385760. Its totient is φ = 194021482823168.

The previous prime is 499999636499977. The next prime is 499999636499983. The reversal of 499999636499980 is 89994636999994.

It is an interprime number because it is at equal distance from previous prime (499999636499977) and next prime (499999636499983).

It is a super-2 number, since 2×499999636499980² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 499999636499980.

It is not an unprimeable number, because it can be changed into a prime (499999636499983) 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, 2649893134 + ... + 2650081813.

It is an arithmetic number, because the mean of its divisors is an integer number (22538143466370).

Almost surely, 2^{499999636499980} is an apocalyptic number.

It is an amenable number.

499999636499980 is an abundant number, since it is smaller than the sum of its proper divisors (581831249885780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

499999636499980 is a wasteful number, since it uses less digits than its factorization.

499999636499980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5299975098 (or 5299975096 counting only the distinct ones).

The product of its (nonzero) digits is 595077871104, while the sum is 103.

The spelling of 499999636499980 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 eighty".