247478891015 has 16 divisors (see below), whose sum is σ = 298864388448. Its totient is φ = 196723852416.

The previous prime is 247478890987. The next prime is 247478891057. The reversal of 247478891015 is 510198874742.

247478891015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 247478891015 - 2¹⁴ = 247478874631 is a prime.

It is a super-2 number, since 2×247478891015² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3825317 + ... + 3889473.

It is an arithmetic number, because the mean of its divisors is an integer number (18679024278).

Almost surely, 2^247478891015 is an apocalyptic number.

247478891015 is a deficient number, since it is larger than the sum of its proper divisors (51385497433).

247478891015 is a wasteful number, since it uses less digits than its factorization.

247478891015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69058.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 247478891015 in words is "two hundred forty-seven billion, four hundred seventy-eight million, eight hundred ninety-one thousand, fifteen".