78468139571 has 4 divisors (see below), whose sum is σ = 78468751200. Its totient is φ = 78467527944.

The previous prime is 78468139483. The next prime is 78468139597. The reversal of 78468139571 is 17593186487.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 78468139571 - 2¹⁴ = 78468123187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78468139571.

It is not an unprimeable number, because it can be changed into a prime (78468139171) 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, 31136 + ... + 397373.

It is an arithmetic number, because the mean of its divisors is an integer number (19617187800).

Almost surely, 2^78468139571 is an apocalyptic number.

78468139571 is a deficient number, since it is larger than the sum of its proper divisors (611629).

78468139571 is a wasteful number, since it uses less digits than its factorization.

78468139571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611628.

The product of its digits is 10160640, while the sum is 59.

The spelling of 78468139571 in words is "seventy-eight billion, four hundred sixty-eight million, one hundred thirty-nine thousand, five hundred seventy-one".