51145751211507 has 24 divisors (see below), whose sum is σ = 75890406096960. Its totient is φ = 33168395185920.

The previous prime is 51145751211497. The next prime is 51145751211539. The reversal of 51145751211507 is 70511215754115.

51145751211507 is a `hidden beast` number, since 5 + 1 + 1 + 4 + 575 + 1 + 21 + 1 + 50 + 7 = 666.

51145751211507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51145751211507 - 2¹¹ = 51145751209459 is a prime.

It is a super-2 number, since 2×51145751211507² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51145751213507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15198582 + ... + 18256187.

It is an arithmetic number, because the mean of its divisors is an integer number (3162100254040).

Almost surely, 2^{51145751211507} is an apocalyptic number.

51145751211507 is a deficient number, since it is larger than the sum of its proper divisors (24744654885453).

51145751211507 is a wasteful number, since it uses less digits than its factorization.

51145751211507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33459403 (or 33459400 counting only the distinct ones).

The product of its (nonzero) digits is 245000, while the sum is 45.

The spelling of 51145751211507 in words is "fifty-one trillion, one hundred forty-five billion, seven hundred fifty-one million, two hundred eleven thousand, five hundred seven".