51706515280 has 160 divisors (see below), whose sum is σ = 143514814464. Its totient is φ = 16939473408.

The previous prime is 51706515277. The next prime is 51706515283. The reversal of 51706515280 is 8251560715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51706515277) and next prime (51706515283).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51706515283) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 19099687 + ... + 19102393.

Almost surely, 2^51706515280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51706515280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71757407232).

51706515280 is an abundant number, since it is smaller than the sum of its proper divisors (91808299184).

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

51706515280 is a wasteful number, since it uses less digits than its factorization.

51706515280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233 (or 4227 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 40.

The spelling of 51706515280 in words is "fifty-one billion, seven hundred six million, five hundred fifteen thousand, two hundred eighty".