499989000261 has 32 divisors (see below), whose sum is σ = 693575424000. Its totient is φ = 319997684160.

The previous prime is 499989000229. The next prime is 499989000289. The reversal of 499989000261 is 162000989994.

It is not a de Polignac number, because 499989000261 - 2⁵ = 499989000229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499989000221) 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, 27813006 + ... + 27830976.

It is an arithmetic number, because the mean of its divisors is an integer number (21674232000).

Almost surely, 2^499989000261 is an apocalyptic number.

It is an amenable number.

499989000261 is a deficient number, since it is larger than the sum of its proper divisors (193586423739).

499989000261 is a wasteful number, since it uses less digits than its factorization.

499989000261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19809.

The product of its (nonzero) digits is 2519424, while the sum is 57.

The spelling of 499989000261 in words is "four hundred ninety-nine billion, nine hundred eighty-nine million, two hundred sixty-one", and thus it is an aban number.