51145445011551 has 32 divisors (see below), whose sum is σ = 76129381785600. Its totient is φ = 30274015346400.

The previous prime is 51145445011543. The next prime is 51145445011601. The reversal of 51145445011551 is 15511054454115.

It is not a de Polignac number, because 51145445011551 - 2³ = 51145445011543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145445061551) 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, 16906546 + ... + 19700816.

It is an arithmetic number, because the mean of its divisors is an integer number (2379043180800).

Almost surely, 2^{51145445011551} is an apocalyptic number.

51145445011551 is a deficient number, since it is larger than the sum of its proper divisors (24983936774049).

51145445011551 is a wasteful number, since it uses less digits than its factorization.

51145445011551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807227.

The product of its (nonzero) digits is 200000, while the sum is 42.

Adding to 51145445011551 its reverse (15511054454115), we get a palindrome (66656499465666).

The spelling of 51145445011551 in words is "fifty-one trillion, one hundred forty-five billion, four hundred forty-five million, eleven thousand, five hundred fifty-one".