247879218249 has 32 divisors (see below), whose sum is σ = 395515635200. Its totient is φ = 152526084480.

The previous prime is 247879218227. The next prime is 247879218253. The reversal of 247879218249 is 942812978742.

It is not a de Polignac number, because 247879218249 - 2²⁷ = 247745000521 is a prime.

It is a super-2 number, since 2×247879218249² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247879218259) 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, 4327104 + ... + 4384014.

It is an arithmetic number, because the mean of its divisors is an integer number (12359863600).

Almost surely, 2^247879218249 is an apocalyptic number.

It is an amenable number.

247879218249 is a deficient number, since it is larger than the sum of its proper divisors (147636416951).

247879218249 is a wasteful number, since it uses less digits than its factorization.

247879218249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69342 (or 69336 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 247879218249 in words is "two hundred forty-seven billion, eight hundred seventy-nine million, two hundred eighteen thousand, two hundred forty-nine".