51045355451 has 4 divisors (see below), whose sum is σ = 51309839352. Its totient is φ = 50780871552.

The previous prime is 51045355433. The next prime is 51045355453. The reversal of 51045355451 is 15455354015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51045355451 - 2¹⁰ = 51045354427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51045355453) 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, 132241661 + ... + 132242046.

It is an arithmetic number, because the mean of its divisors is an integer number (12827459838).

Almost surely, 2^51045355451 is an apocalyptic number.

51045355451 is a deficient number, since it is larger than the sum of its proper divisors (264483901).

51045355451 is a wasteful number, since it uses less digits than its factorization.

51045355451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264483900.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 51045355451 in words is "fifty-one billion, forty-five million, three hundred fifty-five thousand, four hundred fifty-one".