51120740745 has 24 divisors (see below), whose sum is σ = 90494591616. Its totient is φ = 26684300448.

The previous prime is 51120740621. The next prime is 51120740753. The reversal of 51120740745 is 54704702115.

51120740745 is a `hidden beast` number, since 5 + 1 + 1 + 207 + 407 + 45 = 666.

It is not a de Polignac number, because 51120740745 - 2¹⁵ = 51120707977 is a prime.

It is a super-2 number, since 2×51120740745² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12083167 + ... + 12087396.

It is an arithmetic number, because the mean of its divisors is an integer number (3770607984).

Almost surely, 2^51120740745 is an apocalyptic number.

It is an amenable number.

51120740745 is a deficient number, since it is larger than the sum of its proper divisors (39373850871).

51120740745 is a wasteful number, since it uses less digits than its factorization.

51120740745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24170621 (or 24170618 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The spelling of 51120740745 in words is "fifty-one billion, one hundred twenty million, seven hundred forty thousand, seven hundred forty-five".