5178661801 has 4 divisors (see below), whose sum is σ = 5186869504. Its totient is φ = 5170454100.

The previous prime is 5178661777. The next prime is 5178661819. The reversal of 5178661801 is 1081668715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5178661801 - 2⁵ = 5178661769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5178661841) 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, 4102905 + ... + 4104166.

It is an arithmetic number, because the mean of its divisors is an integer number (1296717376).

Almost surely, 2^5178661801 is an apocalyptic number.

It is an amenable number.

5178661801 is a deficient number, since it is larger than the sum of its proper divisors (8207703).

5178661801 is an equidigital number, since it uses as much as digits as its factorization.

5178661801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8207702.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 5178661801 is about 71962.9196253181. The cubic root of 5178661801 is about 1730.1052205262.

The spelling of 5178661801 in words is "five billion, one hundred seventy-eight million, six hundred sixty-one thousand, eight hundred one".