49990499905 has 8 divisors (see below), whose sum is σ = 59991910632. Its totient is φ = 39990192768.

The previous prime is 49990499899. The next prime is 49990499921. The reversal of 49990499905 is 50999409994.

It can be written as a sum of positive squares in 4 ways, for example, as 189667984 + 49800831921 = 13772^2 + 223161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49990499905 - 2⁵ = 49990499873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172732 + ... + 360301.

It is an arithmetic number, because the mean of its divisors is an integer number (7498988829).

Almost surely, 2^49990499905 is an apocalyptic number.

It is an amenable number.

49990499905 is a deficient number, since it is larger than the sum of its proper divisors (10001410727).

49990499905 is a wasteful number, since it uses less digits than its factorization.

49990499905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551795.

The product of its (nonzero) digits is 42515280, while the sum is 67.

The spelling of 49990499905 in words is "forty-nine billion, nine hundred ninety million, four hundred ninety-nine thousand, nine hundred five".