78898841745 has 8 divisors (see below), whose sum is σ = 126238146816. Its totient is φ = 42079382256.

The previous prime is 78898841689. The next prime is 78898841753. The reversal of 78898841745 is 54714889887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78898841745 - 2¹⁴ = 78898825361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78898841745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2629961377 + ... + 2629961406.

It is an arithmetic number, because the mean of its divisors is an integer number (15779768352).

Almost surely, 2^78898841745 is an apocalyptic number.

It is an amenable number.

78898841745 is a deficient number, since it is larger than the sum of its proper divisors (47339305071).

78898841745 is a wasteful number, since it uses less digits than its factorization.

78898841745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259922791.

The product of its digits is 144506880, while the sum is 69.

The spelling of 78898841745 in words is "seventy-eight billion, eight hundred ninety-eight million, eight hundred forty-one thousand, seven hundred forty-five".