51323507651 has 8 divisors (see below), whose sum is σ = 57054420864. Its totient is φ = 45847301760.

The previous prime is 51323507639. The next prime is 51323507687. The reversal of 51323507651 is 15670532315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51323507651 - 2³⁰ = 50249765827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51323507951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63676406 + ... + 63677211.

It is an arithmetic number, because the mean of its divisors is an integer number (7131802608).

Almost surely, 2^51323507651 is an apocalyptic number.

51323507651 is a deficient number, since it is larger than the sum of its proper divisors (5730913213).

51323507651 is a wasteful number, since it uses less digits than its factorization.

51323507651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127353661.

The product of its (nonzero) digits is 94500, while the sum is 38.

The spelling of 51323507651 in words is "fifty-one billion, three hundred twenty-three million, five hundred seven thousand, six hundred fifty-one".