51808005401 has 4 divisors (see below), whose sum is σ = 51813899472. Its totient is φ = 51802111332.

The previous prime is 51808005377. The next prime is 51808005409. The reversal of 51808005401 is 10450080815.

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 51808005401 - 2¹⁰ = 51808004377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51808005409) 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, 2933831 + ... + 2951436.

It is an arithmetic number, because the mean of its divisors is an integer number (12953474868).

Almost surely, 2^51808005401 is an apocalyptic number.

It is an amenable number.

51808005401 is a deficient number, since it is larger than the sum of its proper divisors (5894071).

51808005401 is an equidigital number, since it uses as much as digits as its factorization.

51808005401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894070.

The product of its (nonzero) digits is 6400, while the sum is 32.

The spelling of 51808005401 in words is "fifty-one billion, eight hundred eight million, five thousand, four hundred one".