499905561599 has 16 divisors (see below), whose sum is σ = 506465447040. Its totient is φ = 493385195520.

The previous prime is 499905561593. The next prime is 499905561611. The reversal of 499905561599 is 995165509994.

It is a Cunningham number, because it is equal to 707040²-1.

It is a cyclic number.

It is not a de Polignac number, because 499905561599 - 2⁸ = 499905561343 is a prime.

It is a super-2 number, since 2×499905561599² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499905561593) 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, 79892279 + ... + 79898535.

It is an arithmetic number, because the mean of its divisors is an integer number (31654090440).

Almost surely, 2^499905561599 is an apocalyptic number.

499905561599 is a deficient number, since it is larger than the sum of its proper divisors (6559885441).

499905561599 is a wasteful number, since it uses less digits than its factorization.

499905561599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250.

The product of its (nonzero) digits is 177147000, while the sum is 71.

The spelling of 499905561599 in words is "four hundred ninety-nine billion, nine hundred five million, five hundred sixty-one thousand, five hundred ninety-nine".