78463013547818 has 4 divisors (see below), whose sum is σ = 117694520321730. Its totient is φ = 39231506773908.

The previous prime is 78463013547817. The next prime is 78463013547833. The reversal of 78463013547818 is 81874531036487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68391295629409 + 10071717918409 = 8269903^2 + 3173597^2 .

It is a super-2 number, since 2×78463013547818² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78463013547817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19615753386953 + ... + 19615753386956.

Almost surely, 2^{78463013547818} is an apocalyptic number.

78463013547818 is a deficient number, since it is larger than the sum of its proper divisors (39231506773912).

78463013547818 is a wasteful number, since it uses less digits than its factorization.

78463013547818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39231506773911.

The product of its (nonzero) digits is 108380160, while the sum is 65.

The spelling of 78463013547818 in words is "seventy-eight trillion, four hundred sixty-three billion, thirteen million, five hundred forty-seven thousand, eight hundred eighteen".