78328401730065 has 48 divisors (see below), whose sum is σ = 143785604538576. Its totient is φ = 39309594624000.

The previous prime is 78328401730009. The next prime is 78328401730067. The reversal of 78328401730065 is 56003710482387.

It is a happy number.

78328401730065 is a `hidden beast` number, since 7 + 8 + 328 + 4 + 0 + 1 + 7 + 300 + 6 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 6653366265744 + 71675035464321 = 2579412^2 + 8466111^2 .

It is not a de Polignac number, because 78328401730065 - 2²⁷ = 78328267512337 is a prime.

It is a super-2 number, since 2×78328401730065² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78328401729993 and 78328401730020.

It is not an unprimeable number, because it can be changed into a prime (78328401730067) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6990646 + ... + 14336175.

It is an arithmetic number, because the mean of its divisors is an integer number (2995533427887).

Almost surely, 2^{78328401730065} is an apocalyptic number.

It is an amenable number.

78328401730065 is a deficient number, since it is larger than the sum of its proper divisors (65457202808511).

78328401730065 is a wasteful number, since it uses less digits than its factorization.

78328401730065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21331650 (or 21331647 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 78328401730065 in words is "seventy-eight trillion, three hundred twenty-eight billion, four hundred one million, seven hundred thirty thousand, sixty-five".