51277827801 has 4 divisors (see below), whose sum is σ = 68370437072. Its totient is φ = 34185218532.

The previous prime is 51277827793. The next prime is 51277827803. The reversal of 51277827801 is 10872877215.

It is a happy number.

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 not a de Polignac number, because 51277827801 - 2³ = 51277827793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51277827803) 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, 8546304631 + ... + 8546304636.

It is an arithmetic number, because the mean of its divisors is an integer number (17092609268).

Almost surely, 2^51277827801 is an apocalyptic number.

It is an amenable number.

51277827801 is a deficient number, since it is larger than the sum of its proper divisors (17092609271).

51277827801 is a wasteful number, since it uses less digits than its factorization.

51277827801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17092609270.

The product of its (nonzero) digits is 439040, while the sum is 48.

The spelling of 51277827801 in words is "fifty-one billion, two hundred seventy-seven million, eight hundred twenty-seven thousand, eight hundred one".