78874047887 has 4 divisors (see below), whose sum is σ = 79201326336. Its totient is φ = 78546769440.

The previous prime is 78874047883. The next prime is 78874047929.

78874047887 is nontrivially palindromic in base 10.

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 78874047887 - 2² = 78874047883 is a prime.

It is a super-2 number, since 2×78874047887² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78874047883) 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, 163638863 + ... + 163639344.

It is an arithmetic number, because the mean of its divisors is an integer number (19800331584).

Almost surely, 2^78874047887 is an apocalyptic number.

78874047887 is a deficient number, since it is larger than the sum of its proper divisors (327278449).

78874047887 is a wasteful number, since it uses less digits than its factorization.

78874047887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327278448.

The product of its (nonzero) digits is 157351936, while the sum is 68.

The spelling of 78874047887 in words is "seventy-eight billion, eight hundred seventy-four million, forty-seven thousand, eight hundred eighty-seven".