78164656728143 has 4 divisors (see below), whose sum is σ = 78431430300888. Its totient is φ = 77897883155400.

The previous prime is 78164656728043. The next prime is 78164656728163. The reversal of 78164656728143 is 34182765646187.

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

It is a cyclic number.

It is not a de Polignac number, because 78164656728143 - 2¹⁶ = 78164656662607 is a prime.

It is a super-2 number, since 2×78164656728143² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78164656728163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133386785933 + ... + 133386786518.

It is an arithmetic number, because the mean of its divisors is an integer number (19607857575222).

Almost surely, 2^{78164656728143} is an apocalyptic number.

78164656728143 is a deficient number, since it is larger than the sum of its proper divisors (266773572745).

78164656728143 is a wasteful number, since it uses less digits than its factorization.

78164656728143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266773572744.

The product of its digits is 325140480, while the sum is 68.

The spelling of 78164656728143 in words is "seventy-eight trillion, one hundred sixty-four billion, six hundred fifty-six million, seven hundred twenty-eight thousand, one hundred forty-three".