51444451091 has 32 divisors (see below), whose sum is σ = 60461164800. Its totient is φ = 43276222080.

The previous prime is 51444451063. The next prime is 51444451171. The reversal of 51444451091 is 19015444415.

51444451091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51444451091 - 2¹⁸ = 51444188947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51444451391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1922681 + ... + 1949253.

It is an arithmetic number, because the mean of its divisors is an integer number (1889411400).

Almost surely, 2^51444451091 is an apocalyptic number.

51444451091 is a deficient number, since it is larger than the sum of its proper divisors (9016713709).

51444451091 is a wasteful number, since it uses less digits than its factorization.

51444451091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26819.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 51444451091 in words is "fifty-one billion, four hundred forty-four million, four hundred fifty-one thousand, ninety-one".