51543445145 has 32 divisors (see below), whose sum is σ = 64043872128. Its totient is φ = 39793241088.

The previous prime is 51543445141. The next prime is 51543445189. The reversal of 51543445145 is 54154434515.

It is a cyclic number.

It is not a de Polignac number, because 51543445145 - 2² = 51543445141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51543445141) 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, 11882417 + ... + 11886753.

It is an arithmetic number, because the mean of its divisors is an integer number (2001371004).

Almost surely, 2^51543445145 is an apocalyptic number.

It is an amenable number.

51543445145 is a deficient number, since it is larger than the sum of its proper divisors (12500426983).

51543445145 is a wasteful number, since it uses less digits than its factorization.

51543445145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889.

The product of its digits is 480000, while the sum is 41.

The spelling of 51543445145 in words is "fifty-one billion, five hundred forty-three million, four hundred forty-five thousand, one hundred forty-five".