51449252941728 has 36 divisors (see below), whose sum is σ = 146308813053858. Its totient is φ = 17149750980480.

The previous prime is 51449252941663. The next prime is 51449252941843. The reversal of 51449252941728 is 82714925294415.

51449252941728 is a `hidden beast` number, since 5 + 1 + 4 + 4 + 92 + 529 + 4 + 17 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49644819544464 + 1804433397264 = 7045908^2 + 1343292^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89321619403 + ... + 89321619978.

Almost surely, 2^{51449252941728} is an apocalyptic number.

It is an amenable number.

51449252941728 is an abundant number, since it is smaller than the sum of its proper divisors (94859560112130).

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

51449252941728 is a wasteful number, since it uses less digits than its factorization.

51449252941728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178643239397 (or 178643239386 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 51449252941728 in words is "fifty-one trillion, four hundred forty-nine billion, two hundred fifty-two million, nine hundred forty-one thousand, seven hundred twenty-eight".