247796699985 has 32 divisors (see below), whose sum is σ = 454738037760. Its totient is φ = 127895068800.

The previous prime is 247796699897. The next prime is 247796699989. The reversal of 247796699985 is 589996697742.

247796699985 is a `hidden beast` number, since 2 + 477 + 9 + 6 + 69 + 9 + 9 + 85 = 666.

It is not a de Polignac number, because 247796699985 - 2⁹ = 247796699473 is a prime.

It is a super-2 number, since 2×247796699985² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247796699989) 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, 29601156 + ... + 29609525.

It is an arithmetic number, because the mean of its divisors is an integer number (14210563680).

Almost surely, 2^247796699985 is an apocalyptic number.

It is an amenable number.

247796699985 is a deficient number, since it is larger than the sum of its proper divisors (206941337775).

247796699985 is a wasteful number, since it uses less digits than its factorization.

247796699985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59210726 (or 59210720 counting only the distinct ones).

The product of its digits is 3703553280, while the sum is 81.

The spelling of 247796699985 in words is "two hundred forty-seven billion, seven hundred ninety-six million, six hundred ninety-nine thousand, nine hundred eighty-five".