78426533562487 has 4 divisors (see below), whose sum is σ = 85556218431816. Its totient is φ = 71296848693160.

The previous prime is 78426533562437. The next prime is 78426533562491.

78426533562487 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 78426533562487 - 2¹⁹ = 78426533038199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78426533562437) 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, 3564842434648 + ... + 3564842434669.

It is an arithmetic number, because the mean of its divisors is an integer number (21389054607954).

Almost surely, 2^{78426533562487} is an apocalyptic number.

78426533562487 is a deficient number, since it is larger than the sum of its proper divisors (7129684869329).

78426533562487 is a wasteful number, since it uses less digits than its factorization.

78426533562487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129684869328.

The product of its digits is 1625702400, while the sum is 70.

The spelling of 78426533562487 in words is "seventy-eight trillion, four hundred twenty-six billion, five hundred thirty-three million, five hundred sixty-two thousand, four hundred eighty-seven".