499998777655805 has 24 divisors (see below), whose sum is σ = 635852772009312. Its totient is φ = 377224418483136.

The previous prime is 499998777655691. The next prime is 499998777655843. The reversal of 499998777655805 is 508556777899994.

It is not a de Polignac number, because 499998777655805 - 2²² = 499998773461501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1382444459 + ... + 1382806088.

It is an arithmetic number, because the mean of its divisors is an integer number (26493865500388).

Almost surely, 2^{499998777655805} is an apocalyptic number.

It is an amenable number.

499998777655805 is a deficient number, since it is larger than the sum of its proper divisors (135853994353507).

499998777655805 is a wasteful number, since it uses less digits than its factorization.

499998777655805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765250653 (or 2765250624 counting only the distinct ones).

The product of its (nonzero) digits is 432081216000, while the sum is 98.

The spelling of 499998777655805 in words is "four hundred ninety-nine trillion, nine hundred ninety-eight billion, seven hundred seventy-seven million, six hundred fifty-five thousand, eight hundred five".