51085470550 has 48 divisors (see below), whose sum is σ = 98678684160. Its totient is φ = 19652648960.

The previous prime is 51085470517. The next prime is 51085470581. The reversal of 51085470550 is 5507458015.

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 23 ways as a sum of consecutive naturals, for example, 304107 + ... + 441193.

It is an arithmetic number, because the mean of its divisors is an integer number (2055805920).

Almost surely, 2^51085470550 is an apocalyptic number.

51085470550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51085470550 is a deficient number, since it is larger than the sum of its proper divisors (47593213610).

51085470550 is a wasteful number, since it uses less digits than its factorization.

51085470550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137385 (or 137380 counting only the distinct ones).

The product of its (nonzero) digits is 140000, while the sum is 40.

The spelling of 51085470550 in words is "fifty-one billion, eighty-five million, four hundred seventy thousand, five hundred fifty".