51123446451 has 24 divisors (see below), whose sum is σ = 92066467584. Its totient is φ = 26557634160.

The previous prime is 51123446449. The next prime is 51123446461. The reversal of 51123446451 is 15464432115.

51123446451 is a `hidden beast` number, since 5 + 1 + 1 + 2 + 3 + 4 + 4 + 645 + 1 = 666.

It is not a de Polignac number, because 51123446451 - 2¹ = 51123446449 is a prime.

It is a super-2 number, since 2×51123446451² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51123446431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36884911 + ... + 36886296.

It is an arithmetic number, because the mean of its divisors is an integer number (3836102816).

Almost surely, 2^51123446451 is an apocalyptic number.

51123446451 is a deficient number, since it is larger than the sum of its proper divisors (40943021133).

51123446451 is a wasteful number, since it uses less digits than its factorization.

51123446451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73771231 (or 73771228 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 51123446451 its reverse (15464432115), we get a palindrome (66587878566).

The spelling of 51123446451 in words is "fifty-one billion, one hundred twenty-three million, four hundred forty-six thousand, four hundred fifty-one".