49551940018 has 24 divisors (see below), whose sum is σ = 89252216064. Its totient is φ = 20551494600.

The previous prime is 49551939991. The next prime is 49551940021. The reversal of 49551940018 is 81004915594.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 49551940018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8152318 + ... + 8158393.

It is an arithmetic number, because the mean of its divisors is an integer number (3718842336).

Almost surely, 2^49551940018 is an apocalyptic number.

49551940018 is a deficient number, since it is larger than the sum of its proper divisors (39700276046).

49551940018 is a wasteful number, since it uses less digits than its factorization.

49551940018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16310758 (or 16310751 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 49551940018 in words is "forty-nine billion, five hundred fifty-one million, nine hundred forty thousand, eighteen".