78334446636145 has 16 divisors (see below), whose sum is σ = 107571267923328. Its totient is φ = 53644464282240.

The previous prime is 78334446636143. The next prime is 78334446636157. The reversal of 78334446636145 is 54163664443387.

It is a happy number.

It is not a de Polignac number, because 78334446636145 - 2¹ = 78334446636143 is a prime.

It is a super-2 number, since 2×78334446636145² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78334446636143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470490479 + ... + 1470543748.

It is an arithmetic number, because the mean of its divisors is an integer number (6723204245208).

Almost surely, 2^{78334446636145} is an apocalyptic number.

It is an amenable number.

78334446636145 is a deficient number, since it is larger than the sum of its proper divisors (29236821287183).

78334446636145 is a wasteful number, since it uses less digits than its factorization.

78334446636145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941035000.

The product of its digits is 418037760, while the sum is 64.

The spelling of 78334446636145 in words is "seventy-eight trillion, three hundred thirty-four billion, four hundred forty-six million, six hundred thirty-six thousand, one hundred forty-five".