651155110111 has 12 divisors (see below), whose sum is σ = 716022927256. Its totient is φ = 591718968720.

The previous prime is 651155110097. The next prime is 651155110147. The reversal of 651155110111 is 111011551156.

It is not a de Polignac number, because 651155110111 - 2¹⁷ = 651154979039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 651155110111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651155111111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 792180 + ... + 1389193.

Almost surely, 2^651155110111 is an apocalyptic number.

651155110111 is a deficient number, since it is larger than the sum of its proper divisors (64867817145).

651155110111 is a wasteful number, since it uses less digits than its factorization.

651155110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183862 (or 2183851 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 28.

Adding to 651155110111 its reverse (111011551156), we get a palindrome (762166661267).

The spelling of 651155110111 in words is "six hundred fifty-one billion, one hundred fifty-five million, one hundred ten thousand, one hundred eleven".