51504354520 has 16 divisors (see below), whose sum is σ = 115884797760. Its totient is φ = 20601741792.

The previous prime is 51504354493. The next prime is 51504354523. The reversal of 51504354520 is 2545340515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504354523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643804392 + ... + 643804471.

It is an arithmetic number, because the mean of its divisors is an integer number (7242799860).

Almost surely, 2^51504354520 is an apocalyptic number.

It is an amenable number.

51504354520 is an abundant number, since it is smaller than the sum of its proper divisors (64380443240).

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

51504354520 is a wasteful number, since it uses less digits than its factorization.

51504354520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287608874 (or 1287608870 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 51504354520 in words is "fifty-one billion, five hundred four million, three hundred fifty-four thousand, five hundred twenty".