51554505550 has 12 divisors (see below), whose sum is σ = 95891380416. Its totient is φ = 20621802200.

The previous prime is 51554505511. The next prime is 51554505581. The reversal of 51554505550 is 5550545515.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 515545006 + ... + 515545105.

It is an arithmetic number, because the mean of its divisors is an integer number (7990948368).

Almost surely, 2^51554505550 is an apocalyptic number.

51554505550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51554505550 is a deficient number, since it is larger than the sum of its proper divisors (44336874866).

51554505550 is a wasteful number, since it uses less digits than its factorization.

51554505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031090123 (or 1031090118 counting only the distinct ones).

The product of its (nonzero) digits is 312500, while the sum is 40.

The spelling of 51554505550 in words is "fifty-one billion, five hundred fifty-four million, five hundred five thousand, five hundred fifty".