51069847509 has 48 divisors (see below), whose sum is σ = 82348980480. Its totient is φ = 30308843520.

The previous prime is 51069847501. The next prime is 51069847523. The reversal of 51069847509 is 90574896015.

51069847509 is a `hidden beast` number, since 5 + 1 + 0 + 6 + 98 + 47 + 509 = 666.

It is not a de Polignac number, because 51069847509 - 2³ = 51069847501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51069847501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1849684 + ... + 1877090.

It is an arithmetic number, because the mean of its divisors is an integer number (1715603760).

Almost surely, 2^51069847509 is an apocalyptic number.

It is an amenable number.

51069847509 is a deficient number, since it is larger than the sum of its proper divisors (31279132971).

51069847509 is a wasteful number, since it uses less digits than its factorization.

51069847509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28090 (or 28087 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 51069847509 in words is "fifty-one billion, sixty-nine million, eight hundred forty-seven thousand, five hundred nine".