51198546550 has 12 divisors (see below), whose sum is σ = 95229296676. Its totient is φ = 20479418600.

The previous prime is 51198546491. The next prime is 51198546563. The reversal of 51198546550 is 5564589115.

It is a junction number, because it is equal to n+sod(n) for n = 51198546494 and 51198546503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 511985416 + ... + 511985515.

It is an arithmetic number, because the mean of its divisors is an integer number (7935774723).

Almost surely, 2^51198546550 is an apocalyptic number.

51198546550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51198546550 is a deficient number, since it is larger than the sum of its proper divisors (44030750126).

51198546550 is a wasteful number, since it uses less digits than its factorization.

51198546550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023970943 (or 1023970938 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 49.

The spelling of 51198546550 in words is "fifty-one billion, one hundred ninety-eight million, five hundred forty-six thousand, five hundred fifty".