49370821009 has 4 divisors (see below), whose sum is σ = 49373293860. Its totient is φ = 49368348160.

The previous prime is 49370820991. The next prime is 49370821021. The reversal of 49370821009 is 90012807394.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90012807394 = 2 ⋅45006403697.

It can be written as a sum of positive squares in 2 ways, for example, as 34843822225 + 14526998784 = 186665^2 + 120528^2 .

It is a cyclic number.

It is not a de Polignac number, because 49370821009 - 2⁹ = 49370820497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49370821079) 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, 1206232 + ... + 1246489.

It is an arithmetic number, because the mean of its divisors is an integer number (12343323465).

Almost surely, 2^49370821009 is an apocalyptic number.

It is an amenable number.

49370821009 is a deficient number, since it is larger than the sum of its proper divisors (2472851).

49370821009 is a wasteful number, since it uses less digits than its factorization.

49370821009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472850.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 49370821009 in words is "forty-nine billion, three hundred seventy million, eight hundred twenty-one thousand, nine".