78628384185071 has 32 divisors (see below), whose sum is σ = 92890168320000. Its totient is φ = 65130064035840.

The previous prime is 78628384185047. The next prime is 78628384185101. The reversal of 78628384185071 is 17058148382687.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78628384185071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78628384184992 and 78628384185010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78628384187071) 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, 470044055 + ... + 470211303.

It is an arithmetic number, because the mean of its divisors is an integer number (2902817760000).

Almost surely, 2^{78628384185071} is an apocalyptic number.

78628384185071 is a deficient number, since it is larger than the sum of its proper divisors (14261784134929).

78628384185071 is a wasteful number, since it uses less digits than its factorization.

78628384185071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170319.

The product of its (nonzero) digits is 144506880, while the sum is 68.

The spelling of 78628384185071 in words is "seventy-eight trillion, six hundred twenty-eight billion, three hundred eighty-four million, one hundred eighty-five thousand, seventy-one".