78163200001 has 4 divisors (see below), whose sum is σ = 78184813572. Its totient is φ = 78141586432.

The previous prime is 78163199987. The next prime is 78163200043. The reversal of 78163200001 is 10000236187.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26122640625 + 52040559376 = 161625^2 + 228124^2 .

It is a cyclic number.

It is not a de Polignac number, because 78163200001 - 2²¹ = 78161102849 is a prime.

It is a super-2 number, since 2×78163200001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78163200091) 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, 10801360 + ... + 10808593.

It is an arithmetic number, because the mean of its divisors is an integer number (19546203393).

Almost surely, 2^78163200001 is an apocalyptic number.

It is an amenable number.

78163200001 is a deficient number, since it is larger than the sum of its proper divisors (21613571).

78163200001 is a wasteful number, since it uses less digits than its factorization.

78163200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21613570.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 78163200001 its reverse (10000236187), we get a palindrome (88163436188).

The spelling of 78163200001 in words is "seventy-eight billion, one hundred sixty-three million, two hundred thousand, one".