78896869887 has 24 divisors (see below), whose sum is σ = 115771829040. Its totient is φ = 47757001600.

The previous prime is 78896869873. The next prime is 78896869907.

78896869887 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78896869887 - 2⁴ = 78896869871 is a prime.

It is a super-3 number, since 3×78896869887³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78896861887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159337 + ... + 427997.

It is an arithmetic number, because the mean of its divisors is an integer number (4823826210).

Almost surely, 2^78896869887 is an apocalyptic number.

78896869887 is a deficient number, since it is larger than the sum of its proper divisors (36874959153).

78896869887 is a wasteful number, since it uses less digits than its factorization.

78896869887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269495 (or 269484 counting only the distinct ones).

The product of its digits is 4682022912, while the sum is 84.

The spelling of 78896869887 in words is "seventy-eight billion, eight hundred ninety-six million, eight hundred sixty-nine thousand, eight hundred eighty-seven".