51834901649 has 4 divisors (see below), whose sum is σ = 51837113664. Its totient is φ = 51832689636.

The previous prime is 51834901633. The next prime is 51834901667. The reversal of 51834901649 is 94610943815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94610943815 = 5 ⋅18922188763.

It is a cyclic number.

It is not a de Polignac number, because 51834901649 - 2⁴ = 51834901633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51834901597 and 51834901606.

It is not an unprimeable number, because it can be changed into a prime (51834901669) 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, 1070477 + ... + 1117850.

It is an arithmetic number, because the mean of its divisors is an integer number (12959278416).

Almost surely, 2^51834901649 is an apocalyptic number.

It is an amenable number.

51834901649 is a deficient number, since it is larger than the sum of its proper divisors (2212015).

51834901649 is a wasteful number, since it uses less digits than its factorization.

51834901649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212014.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 51834901649 in words is "fifty-one billion, eight hundred thirty-four million, nine hundred one thousand, six hundred forty-nine".