51023461611 has 4 divisors (see below), whose sum is σ = 68031282152. Its totient is φ = 34015641072.

The previous prime is 51023461609. The next prime is 51023461673. The reversal of 51023461611 is 11616432015.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51023461611 - 2¹ = 51023461609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51023461711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8503910266 + ... + 8503910271.

It is an arithmetic number, because the mean of its divisors is an integer number (17007820538).

Almost surely, 2^51023461611 is an apocalyptic number.

51023461611 is a deficient number, since it is larger than the sum of its proper divisors (17007820541).

51023461611 is a wasteful number, since it uses less digits than its factorization.

51023461611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17007820540.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 51023461611 its reverse (11616432015), we get a palindrome (62639893626).

The spelling of 51023461611 in words is "fifty-one billion, twenty-three million, four hundred sixty-one thousand, six hundred eleven".