47782723181 has 4 divisors (see below), whose sum is σ = 47783165664. Its totient is φ = 47782280700.

The previous prime is 47782723151. The next prime is 47782723199. The reversal of 47782723181 is 18132728774.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47782723181 is a prime.

It is a super-2 number, since 2×47782723181² (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 (47782723151) 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, 59426 + ... + 314796.

It is an arithmetic number, because the mean of its divisors is an integer number (11945791416).

Almost surely, 2^47782723181 is an apocalyptic number.

It is an amenable number.

47782723181 is a deficient number, since it is larger than the sum of its proper divisors (442483).

47782723181 is a wasteful number, since it uses less digits than its factorization.

47782723181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442482.

The product of its digits is 1053696, while the sum is 50.

The spelling of 47782723181 in words is "forty-seven billion, seven hundred eighty-two million, seven hundred twenty-three thousand, one hundred eighty-one".