247855461538 has 4 divisors (see below), whose sum is σ = 371783192310. Its totient is φ = 123927730768.

The previous prime is 247855461533. The next prime is 247855461569. The reversal of 247855461538 is 835164558742.

247855461538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 184292479849 + 63562981689 = 429293^2 + 252117^2 .

It is a super-2 number, since 2×247855461538² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (247855461533) 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 as a sum of consecutive naturals, namely, 61963865383 + ... + 61963865386.

Almost surely, 2^247855461538 is an apocalyptic number.

247855461538 is a deficient number, since it is larger than the sum of its proper divisors (123927730772).

247855461538 is a wasteful number, since it uses less digits than its factorization.

247855461538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123927730771.

The product of its digits is 32256000, while the sum is 58.

The spelling of 247855461538 in words is "two hundred forty-seven billion, eight hundred fifty-five million, four hundred sixty-one thousand, five hundred thirty-eight".