78465784618518 has 64 divisors (see below), whose sum is σ = 172098470880000. Its totient is φ = 23652474716160.

The previous prime is 78465784618513. The next prime is 78465784618541. The reversal of 78465784618518 is 81581648756487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78465784618511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168533293 + ... + 168998231.

It is an arithmetic number, because the mean of its divisors is an integer number (2689038607500).

Almost surely, 2^{78465784618518} is an apocalyptic number.

78465784618518 is an abundant number, since it is smaller than the sum of its proper divisors (93632686261482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78465784618518 is a wasteful number, since it uses less digits than its factorization.

78465784618518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478397.

The product of its digits is 2890137600, while the sum is 78.

The spelling of 78465784618518 in words is "seventy-eight trillion, four hundred sixty-five billion, seven hundred eighty-four million, six hundred eighteen thousand, five hundred eighteen".