51555053109 has 24 divisors (see below), whose sum is σ = 80053904448. Its totient is φ = 29426517120.

The previous prime is 51555053101. The next prime is 51555053113. The reversal of 51555053109 is 90135055515.

It is not a de Polignac number, because 51555053109 - 2³ = 51555053101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555053101) 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 23 ways as a sum of consecutive naturals, for example, 69537 + ... + 328550.

It is an arithmetic number, because the mean of its divisors is an integer number (3335579352).

Almost surely, 2^51555053109 is an apocalyptic number.

It is an amenable number.

51555053109 is a deficient number, since it is larger than the sum of its proper divisors (28498851339).

51555053109 is a wasteful number, since it uses less digits than its factorization.

51555053109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398985 (or 398978 counting only the distinct ones).

The product of its (nonzero) digits is 84375, while the sum is 39.

The spelling of 51555053109 in words is "fifty-one billion, five hundred fifty-five million, fifty-three thousand, one hundred nine".