51851269470 has 512 divisors, whose sum is σ = 172064342016. Its totient is φ = 9654220800.

The previous prime is 51851269367. The next prime is 51851269487. The reversal of 51851269470 is 7496215815.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 255 ways as a sum of consecutive naturals, for example, 176966644 + ... + 176966936.

It is an arithmetic number, because the mean of its divisors is an integer number (336063168).

Almost surely, 2^51851269470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51851269470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86032171008).

51851269470 is an abundant number, since it is smaller than the sum of its proper divisors (120213072546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51851269470 is a wasteful number, since it uses less digits than its factorization.

51851269470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 51851269470 in words is "fifty-one billion, eight hundred fifty-one million, two hundred sixty-nine thousand, four hundred seventy".