51893448520 has 32 divisors (see below), whose sum is σ = 117916310520. Its totient is φ = 20551859200.

The previous prime is 51893448517. The next prime is 51893448577. The reversal of 51893448520 is 2584439815.

It can be written as a sum of positive squares in 4 ways, for example, as 50784425316 + 1109023204 = 225354^2 + 33302^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6418417 + ... + 6426496.

Almost surely, 2^51893448520 is an apocalyptic number.

It is an amenable number.

51893448520 is an abundant number, since it is smaller than the sum of its proper divisors (66022862000).

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

51893448520 is a wasteful number, since it uses less digits than its factorization.

51893448520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12845025 (or 12845021 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 51893448520 in words is "fifty-one billion, eight hundred ninety-three million, four hundred forty-eight thousand, five hundred twenty".