51641024520 has 64 divisors (see below), whose sum is σ = 157235382720. Its totient is φ = 13565401344.

The previous prime is 51641024489. The next prime is 51641024527. The reversal of 51641024520 is 2542014615.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51641024527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3203467 + ... + 3219546.

It is an arithmetic number, because the mean of its divisors is an integer number (2456802855).

Almost surely, 2^51641024520 is an apocalyptic number.

It is an amenable number.

51641024520 is an abundant number, since it is smaller than the sum of its proper divisors (105594358200).

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

51641024520 is a wasteful number, since it uses less digits than its factorization.

51641024520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423094 (or 6423090 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 51641024520 in words is "fifty-one billion, six hundred forty-one million, twenty-four thousand, five hundred twenty".