51015000661611 has 64 divisors (see below), whose sum is σ = 78902348313600. Its totient is φ = 28717908350976.

The previous prime is 51015000661591. The next prime is 51015000661613. The reversal of 51015000661611 is 11616600051015.

It is a de Polignac number, because none of the positive numbers 2^k-51015000661611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51015000661613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 956941225 + ... + 956994533.

It is an arithmetic number, because the mean of its divisors is an integer number (1232849192400).

Almost surely, 2^{51015000661611} is an apocalyptic number.

51015000661611 is a deficient number, since it is larger than the sum of its proper divisors (27887347651989).

51015000661611 is a wasteful number, since it uses less digits than its factorization.

51015000661611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55988.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 51015000661611 in words is "fifty-one trillion, fifteen billion, six hundred sixty-one thousand, six hundred eleven".