51285541850 has 48 divisors (see below), whose sum is σ = 96102974016. Its totient is φ = 20361360000.

The previous prime is 51285541787. The next prime is 51285541859. The reversal of 51285541850 is 5814558215.

It is not an unprimeable number, because it can be changed into a prime (51285541859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12991577 + ... + 12995523.

It is an arithmetic number, because the mean of its divisors is an integer number (2002145292).

Almost surely, 2^51285541850 is an apocalyptic number.

51285541850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51285541850 is a deficient number, since it is larger than the sum of its proper divisors (44817432166).

51285541850 is a wasteful number, since it uses less digits than its factorization.

51285541850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5831 (or 5826 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 44.

The spelling of 51285541850 in words is "fifty-one billion, two hundred eighty-five million, five hundred forty-one thousand, eight hundred fifty".