51145616643 has 32 divisors (see below), whose sum is σ = 75223744512. Its totient is φ = 30653316000.

The previous prime is 51145616633. The next prime is 51145616677. The reversal of 51145616643 is 34661654115.

It is not a de Polignac number, because 51145616643 - 2⁹ = 51145616131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51145616595 and 51145616604.

It is not an unprimeable number, because it can be changed into a prime (51145616633) 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, 1088196 + ... + 1134222.

It is an arithmetic number, because the mean of its divisors is an integer number (2350742016).

Almost surely, 2^51145616643 is an apocalyptic number.

51145616643 is a deficient number, since it is larger than the sum of its proper divisors (24078127869).

51145616643 is a wasteful number, since it uses less digits than its factorization.

51145616643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46415.

The product of its digits is 259200, while the sum is 42.

The spelling of 51145616643 in words is "fifty-one billion, one hundred forty-five million, six hundred sixteen thousand, six hundred forty-three".