78881467744137 has 4 divisors (see below), whose sum is σ = 105175290325520. Its totient is φ = 52587645162756.

The previous prime is 78881467744109. The next prime is 78881467744153. The reversal of 78881467744137 is 73144776418887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78881467744137 - 2¹² = 78881467740041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78881467754137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13146911290687 + ... + 13146911290692.

It is an arithmetic number, because the mean of its divisors is an integer number (26293822581380).

Almost surely, 2^{78881467744137} is an apocalyptic number.

It is an amenable number.

78881467744137 is a deficient number, since it is larger than the sum of its proper divisors (26293822581383).

78881467744137 is a wasteful number, since it uses less digits than its factorization.

78881467744137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26293822581382.

The product of its digits is 1416167424, while the sum is 75.

The spelling of 78881467744137 in words is "seventy-eight trillion, eight hundred eighty-one billion, four hundred sixty-seven million, seven hundred forty-four thousand, one hundred thirty-seven".