499999998156 has 12 divisors (see below), whose sum is σ = 1166666662392. Its totient is φ = 166666666048.

The previous prime is 499999998133. The next prime is 499999998161. The reversal of 499999998156 is 651899999994.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20833333245 + ... + 20833333268.

It is an arithmetic number, because the mean of its divisors is an integer number (97222221866).

Almost surely, 2^499999998156 is an apocalyptic number.

It is an amenable number.

499999998156 is an abundant number, since it is smaller than the sum of its proper divisors (666666664236).

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

499999998156 is a wasteful number, since it uses less digits than its factorization.

499999998156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41666666520 (or 41666666518 counting only the distinct ones).

The product of its digits is 4591650240, while the sum is 87.

The spelling of 499999998156 in words is "four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, one hundred fifty-six".