247878615042 has 64 divisors (see below), whose sum is σ = 568882828800. Its totient is φ = 79959496320.

The previous prime is 247878614993. The next prime is 247878615059. The reversal of 247878615042 is 240516878742.

247878615042 is a `hidden beast` number, since 2 + 4 + 7 + 8 + 78 + 61 + 504 + 2 = 666.

It is a super-2 number, since 2×247878615042² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 247878615042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322809 + ... + 774572.

It is an arithmetic number, because the mean of its divisors is an integer number (8888794200).

Almost surely, 2^247878615042 is an apocalyptic number.

247878615042 is an abundant number, since it is smaller than the sum of its proper divisors (321004213758).

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

247878615042 is a wasteful number, since it uses less digits than its factorization.

247878615042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097528 (or 1097522 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 247878615042 in words is "two hundred forty-seven billion, eight hundred seventy-eight million, six hundred fifteen thousand, forty-two".