78163136243 has 8 divisors (see below), whose sum is σ = 78784868400. Its totient is φ = 77542699680.

The previous prime is 78163136147. The next prime is 78163136287. The reversal of 78163136243 is 34263136187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78163136243 - 2¹² = 78163132147 is a prime.

It is a super-2 number, since 2×78163136243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78163136194 and 78163136203.

It is not an unprimeable number, because it can be changed into a prime (78163336243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202580 + ... + 444257.

It is an arithmetic number, because the mean of its divisors is an integer number (9848108550).

Almost surely, 2^78163136243 is an apocalyptic number.

78163136243 is a deficient number, since it is larger than the sum of its proper divisors (621732157).

78163136243 is a wasteful number, since it uses less digits than its factorization.

78163136243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647797.

The product of its digits is 435456, while the sum is 44.

The spelling of 78163136243 in words is "seventy-eight billion, one hundred sixty-three million, one hundred thirty-six thousand, two hundred forty-three".