49898486809 has 4 divisors (see below), whose sum is σ = 49899092404. Its totient is φ = 49897881216.

The previous prime is 49898486801. The next prime is 49898486837. The reversal of 49898486809 is 90868489894.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28763142409 + 21135344400 = 169597^2 + 145380^2 .

It is a cyclic number.

It is not a de Polignac number, because 49898486809 - 2³ = 49898486801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49898486801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155232 + ... + 351985.

It is an arithmetic number, because the mean of its divisors is an integer number (12474773101).

Almost surely, 2^49898486809 is an apocalyptic number.

It is an amenable number.

49898486809 is a deficient number, since it is larger than the sum of its proper divisors (605595).

49898486809 is an equidigital number, since it uses as much as digits as its factorization.

49898486809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605594.

The product of its (nonzero) digits is 286654464, while the sum is 73.

The spelling of 49898486809 in words is "forty-nine billion, eight hundred ninety-eight million, four hundred eighty-six thousand, eight hundred nine".