247473947856 has 160 divisors (see below), whose sum is σ = 695149793280. Its totient is φ = 75575808000.

The previous prime is 247473947813. The next prime is 247473947857. The reversal of 247473947856 is 658749374742.

247473947856 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247473947856² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247473947857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64260331 + ... + 64264181.

It is an arithmetic number, because the mean of its divisors is an integer number (4344686208).

Almost surely, 2^247473947856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247473947856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347574896640).

247473947856 is an abundant number, since it is smaller than the sum of its proper divisors (447675845424).

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

247473947856 is a wasteful number, since it uses less digits than its factorization.

247473947856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185 (or 6179 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 66.

The spelling of 247473947856 in words is "two hundred forty-seven billion, four hundred seventy-three million, nine hundred forty-seven thousand, eight hundred fifty-six".