51445307137642 has 16 divisors (see below), whose sum is σ = 84191870593152. Its totient is φ = 23381830313920.

The previous prime is 51445307137603. The next prime is 51445307137649. The reversal of 51445307137642 is 24673170354415.

51445307137642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51445307137642² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51445307137642.

It is not an unprimeable number, because it can be changed into a prime (51445307137649) 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 7 ways as a sum of consecutive naturals, for example, 119790943 + ... + 120219634.

It is an arithmetic number, because the mean of its divisors is an integer number (5261991912072).

Almost surely, 2^{51445307137642} is an apocalyptic number.

51445307137642 is a deficient number, since it is larger than the sum of its proper divisors (32746563455510).

51445307137642 is a wasteful number, since it uses less digits than its factorization.

51445307137642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240020333.

The product of its (nonzero) digits is 8467200, while the sum is 52.

The spelling of 51445307137642 in words is "fifty-one trillion, four hundred forty-five billion, three hundred seven million, one hundred thirty-seven thousand, six hundred forty-two".