7878175801 has 2 divisors, whose sum is σ = 7878175802. Its totient is φ = 7878175800.

The previous prime is 7878175769. The next prime is 7878175807. The reversal of 7878175801 is 1085718787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5769162025 + 2109013776 = 75955^2 + 45924^2 .

It is a cyclic number.

It is not a de Polignac number, because 7878175801 - 2⁵ = 7878175769 is a prime.

It is not a weakly prime, because it can be changed into another prime (7878175807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939087900 + 3939087901.

It is an arithmetic number, because the mean of its divisors is an integer number (3939087901).

Almost surely, 2^7878175801 is an apocalyptic number.

It is an amenable number.

7878175801 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878175801 is an equidigital number, since it uses as much as digits as its factorization.

7878175801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 878080, while the sum is 52.

The square root of 7878175801 is about 88759.0885543559. The cubic root of 7878175801 is about 1989.7960112614.

The spelling of 7878175801 in words is "seven billion, eight hundred seventy-eight million, one hundred seventy-five thousand, eight hundred one".