49681509 has 8 divisors (see below), whose sum is σ = 66387552. Its totient is φ = 33048240.

The previous prime is 49681493. The next prime is 49681529. The reversal of 49681509 is 90518694.

49681509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 49681509 - 2⁴ = 49681493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49681529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16579 + ... + 19344.

It is an arithmetic number, because the mean of its divisors is an integer number (8298444).

Almost surely, 2^49681509 is an apocalyptic number.

It is an amenable number.

49681509 is a deficient number, since it is larger than the sum of its proper divisors (16706043).

49681509 is a wasteful number, since it uses less digits than its factorization.

49681509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36387.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 49681509 is about 7048.5111193783. The cubic root of 49681509 is about 367.6192625094.

The spelling of 49681509 in words is "forty-nine million, six hundred eighty-one thousand, five hundred nine".