51291038723 has 8 divisors (see below), whose sum is σ = 51447144000. Its totient is φ = 51134986368.

The previous prime is 51291038717. The next prime is 51291038753. The reversal of 51291038723 is 32783019215.

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

It is a cyclic number.

It is not a de Polignac number, because 51291038723 - 2¹⁶ = 51290973187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51291038713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2855990 + ... + 2873892.

It is an arithmetic number, because the mean of its divisors is an integer number (6430893000).

Almost surely, 2^51291038723 is an apocalyptic number.

51291038723 is a deficient number, since it is larger than the sum of its proper divisors (156105277).

51291038723 is a wasteful number, since it uses less digits than its factorization.

51291038723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26461.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 51291038723 in words is "fifty-one billion, two hundred ninety-one million, thirty-eight thousand, seven hundred twenty-three".