47121215378 has 16 divisors (see below), whose sum is σ = 71317337976. Its totient is φ = 23348828160.

The previous prime is 47121215371. The next prime is 47121215381. The reversal of 47121215378 is 87351212174.

It can be written as a sum of positive squares in 4 ways, for example, as 14065248409 + 33055966969 = 118597^2 + 181813^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47121215371) 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 7 ways as a sum of consecutive naturals, for example, 2757950 + ... + 2774982.

Almost surely, 2^47121215378 is an apocalyptic number.

47121215378 is a deficient number, since it is larger than the sum of its proper divisors (24196122598).

47121215378 is a wasteful number, since it uses less digits than its factorization.

47121215378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29389.

The product of its digits is 94080, while the sum is 41.

The spelling of 47121215378 in words is "forty-seven billion, one hundred twenty-one million, two hundred fifteen thousand, three hundred seventy-eight".