247438728675 has 72 divisors (see below), whose sum is σ = 445365423360. Its totient is φ = 131320857600.

The previous prime is 247438728629. The next prime is 247438728683. The reversal of 247438728675 is 576827834742.

247438728675 is a `hidden beast` number, since 2 + 474 + 3 + 87 + 2 + 86 + 7 + 5 = 666.

It is not a de Polignac number, because 247438728675 - 2²⁰ = 247437680099 is a prime.

It is a super-2 number, since 2×247438728675² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 65788795 + ... + 65792555.

It is an arithmetic number, because the mean of its divisors is an integer number (6185630880).

Almost surely, 2^247438728675 is an apocalyptic number.

247438728675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

247438728675 is a deficient number, since it is larger than the sum of its proper divisors (197926694685).

247438728675 is a wasteful number, since it uses less digits than its factorization.

247438728675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133 (or 5125 counting only the distinct ones).

The product of its digits is 126443520, while the sum is 63.

The spelling of 247438728675 in words is "two hundred forty-seven billion, four hundred thirty-eight million, seven hundred twenty-eight thousand, six hundred seventy-five".