51545152240 has 40 divisors (see below), whose sum is σ = 119983133088. Its totient is φ = 20593862400.

The previous prime is 51545152207. The next prime is 51545152259. The reversal of 51545152240 is 4225154515.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 51545152196 and 51545152205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309436 + ... + 445915.

Almost surely, 2^51545152240 is an apocalyptic number.

It is an amenable number.

51545152240 is an abundant number, since it is smaller than the sum of its proper divisors (68437980848).

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

51545152240 is a wasteful number, since it uses less digits than its factorization.

51545152240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756217 (or 756211 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 51545152240 in words is "fifty-one billion, five hundred forty-five million, one hundred fifty-two thousand, two hundred forty".