78745831201 has 4 divisors (see below), whose sum is σ = 78752442132. Its totient is φ = 78739220272.

The previous prime is 78745831187. The next prime is 78745831231. The reversal of 78745831201 is 10213854787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10213854787 = 73 ⋅139915819.

It can be written as a sum of positive squares in 2 ways, for example, as 73929610000 + 4816221201 = 271900^2 + 69399^2 .

It is a cyclic number.

It is not a de Polignac number, because 78745831201 - 2³⁵ = 44386092833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78745831231) 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, 3287566 + ... + 3311431.

It is an arithmetic number, because the mean of its divisors is an integer number (19688110533).

Almost surely, 2^78745831201 is an apocalyptic number.

It is an amenable number.

78745831201 is a deficient number, since it is larger than the sum of its proper divisors (6610931).

78745831201 is a wasteful number, since it uses less digits than its factorization.

78745831201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610930.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 78745831201 in words is "seventy-eight billion, seven hundred forty-five million, eight hundred thirty-one thousand, two hundred one".