51443554551 has 16 divisors (see below), whose sum is σ = 69120160896. Its totient is φ = 34032086496.

The previous prime is 51443554537. The next prime is 51443554559. The reversal of 51443554551 is 15545534415.

It is not a de Polignac number, because 51443554551 - 2⁹ = 51443554039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51443554559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176676 + ... + 366198.

It is an arithmetic number, because the mean of its divisors is an integer number (4320010056).

Almost surely, 2^51443554551 is an apocalyptic number.

51443554551 is a deficient number, since it is larger than the sum of its proper divisors (17676606345).

51443554551 is a wasteful number, since it uses less digits than its factorization.

51443554551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190222.

The product of its digits is 600000, while the sum is 42.

The spelling of 51443554551 in words is "fifty-one billion, four hundred forty-three million, five hundred fifty-four thousand, five hundred fifty-one".