247583871978 has 8 divisors (see below), whose sum is σ = 495167743968. Its totient is φ = 82527957324.

The previous prime is 247583871973. The next prime is 247583872007. The reversal of 247583871978 is 879178385742.

247583871978 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

247583871978 is an admirable number.

It is a super-2 number, since 2×247583871978² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247583871971) 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 3 ways as a sum of consecutive naturals, for example, 20631989326 + ... + 20631989337.

It is an arithmetic number, because the mean of its divisors is an integer number (61895967996).

Almost surely, 2^247583871978 is an apocalyptic number.

247583871978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

247583871978 is a wasteful number, since it uses less digits than its factorization.

247583871978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41263978668.

The product of its digits is 189665280, while the sum is 69.

The spelling of 247583871978 in words is "two hundred forty-seven billion, five hundred eighty-three million, eight hundred seventy-one thousand, nine hundred seventy-eight".