49918639569 has 8 divisors (see below), whose sum is σ = 66590614272. Its totient is φ = 33262878960.

The previous prime is 49918639543. The next prime is 49918639621. The reversal of 49918639569 is 96593681994.

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

It is not a de Polignac number, because 49918639569 - 2²³ = 49910250961 is a prime.

It is a super-2 number, since 2×49918639569² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49918639769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4046337 + ... + 4058654.

It is an arithmetic number, because the mean of its divisors is an integer number (8323826784).

Almost surely, 2^49918639569 is an apocalyptic number.

It is an amenable number.

49918639569 is a deficient number, since it is larger than the sum of its proper divisors (16671974703).

49918639569 is a wasteful number, since it uses less digits than its factorization.

49918639569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107047.

The product of its digits is 113374080, while the sum is 69.

The spelling of 49918639569 in words is "forty-nine billion, nine hundred eighteen million, six hundred thirty-nine thousand, five hundred sixty-nine".