78898841747 has 4 divisors (see below), whose sum is σ = 86071463736. Its totient is φ = 71726219760.

The previous prime is 78898841689. The next prime is 78898841753. The reversal of 78898841747 is 74714889887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78898841747 - 2¹⁸ = 78898579603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78898849747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3586310978 + ... + 3586310999.

It is an arithmetic number, because the mean of its divisors is an integer number (21517865934).

Almost surely, 2^78898841747 is an apocalyptic number.

78898841747 is a deficient number, since it is larger than the sum of its proper divisors (7172621989).

78898841747 is a wasteful number, since it uses less digits than its factorization.

78898841747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7172621988.

The product of its digits is 202309632, while the sum is 71.

The spelling of 78898841747 in words is "seventy-eight billion, eight hundred ninety-eight million, eight hundred forty-one thousand, seven hundred forty-seven".