499649571778 has 16 divisors (see below), whose sum is σ = 857030780160. Its totient is φ = 214013366496.

The previous prime is 499649571749. The next prime is 499649571787. The reversal of 499649571778 is 877175946994.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10154938 + ... + 10204021.

It is an arithmetic number, because the mean of its divisors is an integer number (53564423760).

Almost surely, 2^499649571778 is an apocalyptic number.

499649571778 is a deficient number, since it is larger than the sum of its proper divisors (357381208382).

499649571778 is a wasteful number, since it uses less digits than its factorization.

499649571778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20360721.

The product of its digits is 960180480, while the sum is 76.

The spelling of 499649571778 in words is "four hundred ninety-nine billion, six hundred forty-nine million, five hundred seventy-one thousand, seven hundred seventy-eight".