78755512487 has 4 divisors (see below), whose sum is σ = 82900539480. Its totient is φ = 74610485496.

The previous prime is 78755512463. The next prime is 78755512529. The reversal of 78755512487 is 78421555787.

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 78755512487 - 2¹⁶ = 78755446951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78755512427) 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, 2072513468 + ... + 2072513505.

It is an arithmetic number, because the mean of its divisors is an integer number (20725134870).

Almost surely, 2^78755512487 is an apocalyptic number.

78755512487 is a deficient number, since it is larger than the sum of its proper divisors (4145026993).

78755512487 is a wasteful number, since it uses less digits than its factorization.

78755512487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145026992.

The product of its digits is 21952000, while the sum is 59.

The spelling of 78755512487 in words is "seventy-eight billion, seven hundred fifty-five million, five hundred twelve thousand, four hundred eighty-seven".