49909582081 has 4 divisors (see below), whose sum is σ = 49928159232. Its totient is φ = 49891004932.

The previous prime is 49909582061. The next prime is 49909582111. The reversal of 49909582081 is 18028590994.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49909582081 - 2⁵ = 49909582049 is a prime.

It is a super-2 number, since 2×49909582081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49909582061) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9284545 + ... + 9289918.

It is an arithmetic number, because the mean of its divisors is an integer number (12482039808).

Almost surely, 2^49909582081 is an apocalyptic number.

It is an amenable number.

49909582081 is a deficient number, since it is larger than the sum of its proper divisors (18577151).

49909582081 is a wasteful number, since it uses less digits than its factorization.

49909582081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18577150.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 49909582081 in words is "forty-nine billion, nine hundred nine million, five hundred eighty-two thousand, eighty-one".