78643871151 has 4 divisors (see below), whose sum is σ = 104858494872. Its totient is φ = 52429247432.

The previous prime is 78643871143. The next prime is 78643871153. The reversal of 78643871151 is 15117834687.

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 78643871151 - 2³ = 78643871143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78643871094 and 78643871103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78643871153) 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, 13107311856 + ... + 13107311861.

It is an arithmetic number, because the mean of its divisors is an integer number (26214623718).

Almost surely, 2^78643871151 is an apocalyptic number.

78643871151 is a deficient number, since it is larger than the sum of its proper divisors (26214623721).

78643871151 is a wasteful number, since it uses less digits than its factorization.

78643871151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26214623720.

The product of its digits is 1128960, while the sum is 51.

The spelling of 78643871151 in words is "seventy-eight billion, six hundred forty-three million, eight hundred seventy-one thousand, one hundred fifty-one".