47918881919 has 4 divisors (see below), whose sum is σ = 47962092120. Its totient is φ = 47875671720.

The previous prime is 47918881861. The next prime is 47918881951. The reversal of 47918881919 is 91918881974.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47918881919 - 2³² = 43623914623 is a prime.

It is a super-2 number, since 2×47918881919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47918881519) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21603437 + ... + 21605654.

It is an arithmetic number, because the mean of its divisors is an integer number (11990523030).

Almost surely, 2^47918881919 is an apocalyptic number.

47918881919 is a deficient number, since it is larger than the sum of its proper divisors (43210201).

47918881919 is a wasteful number, since it uses less digits than its factorization.

47918881919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43210200.

The product of its digits is 10450944, while the sum is 65.

The spelling of 47918881919 in words is "forty-seven billion, nine hundred eighteen million, eight hundred eighty-one thousand, nine hundred nineteen".