78464046487 has 4 divisors (see below), whose sum is σ = 79793945640. Its totient is φ = 77134147336.

The previous prime is 78464046473. The next prime is 78464046491.

It is a happy number.

78464046487 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 78464046487 - 2²³ = 78455657879 is a prime.

It is a super-2 number, since 2×78464046487² (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 (78464046887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664949488 + ... + 664949605.

It is an arithmetic number, because the mean of its divisors is an integer number (19948486410).

Almost surely, 2^78464046487 is an apocalyptic number.

78464046487 is a deficient number, since it is larger than the sum of its proper divisors (1329899153).

78464046487 is a wasteful number, since it uses less digits than its factorization.

78464046487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329899152.

The product of its (nonzero) digits is 28901376, while the sum is 58.

The spelling of 78464046487 in words is "seventy-eight billion, four hundred sixty-four million, forty-six thousand, four hundred eighty-seven".