47308317138 has 20 divisors (see below), whose sum is σ = 106005673950. Its totient is φ = 15769438992.

The previous prime is 47308317107. The next prime is 47308317143. The reversal of 47308317138 is 83171380374.

47308317138 is a `hidden beast` number, since 473 + 0 + 8 + 3 + 171 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 47307555009 + 762129 = 217503^2 + 873^2 .

It is a super-2 number, since 2×47308317138² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 47308317093 and 47308317102.

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 9 ways as a sum of consecutive naturals, for example, 146013163 + ... + 146013486.

Almost surely, 2^47308317138 is an apocalyptic number.

47308317138 is an abundant number, since it is smaller than the sum of its proper divisors (58697356812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47308317138 is a wasteful number, since it uses less digits than its factorization.

47308317138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292026663 (or 292026654 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 47308317138 in words is "forty-seven billion, three hundred eight million, three hundred seventeen thousand, one hundred thirty-eight".