49739781218 has 16 divisors (see below), whose sum is σ = 79612343520. Its totient is φ = 23238194976.

The previous prime is 49739781197. The next prime is 49739781239. The reversal of 49739781218 is 81218793794.

It is an interprime number because it is at equal distance from previous prime (49739781197) and next prime (49739781239).

It is a super-2 number, since 2×49739781218² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 8962580 + ... + 8968127.

It is an arithmetic number, because the mean of its divisors is an integer number (4975771470).

Almost surely, 2^49739781218 is an apocalyptic number.

49739781218 is a deficient number, since it is larger than the sum of its proper divisors (29872562302).

49739781218 is a wasteful number, since it uses less digits than its factorization.

49739781218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17930801.

The product of its digits is 6096384, while the sum is 59.

The spelling of 49739781218 in words is "forty-nine billion, seven hundred thirty-nine million, seven hundred eighty-one thousand, two hundred eighteen".