78898655689887 has 8 divisors (see below), whose sum is σ = 114761681003520. Its totient is φ = 47817367084760.

The previous prime is 78898655689883. The next prime is 78898655689907.

78898655689887 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 78898655689887 - 2² = 78898655689883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78898655689791 and 78898655689800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78898655689883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195434177087 + ... + 1195434177152.

It is an arithmetic number, because the mean of its divisors is an integer number (14345210125440).

Almost surely, 2^{78898655689887} is an apocalyptic number.

78898655689887 is a deficient number, since it is larger than the sum of its proper divisors (35863025313633).

78898655689887 is a wasteful number, since it uses less digits than its factorization.

78898655689887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390868354253.

The product of its digits is 936404582400, while the sum is 102.

The spelling of 78898655689887 in words is "seventy-eight trillion, eight hundred ninety-eight billion, six hundred fifty-five million, six hundred eighty-nine thousand, eight hundred eighty-seven".