50864839177681 has 9 divisors (see below), whose sum is σ = 54033020239899. Its totient is φ = 47872675702944.

The previous prime is 50864839177667. The next prime is 50864839177693. The reversal of 50864839177681 is 18677193846805.

The square root of 50864839177681 is 7131959.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 39600653339025 + 11264185838656 = 6292905^2 + 3356216^2 .

It is not a de Polignac number, because 50864839177681 - 2⁴³ = 42068746155473 is a prime.

It is a super-2 number, since 2×50864839177681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50864839177651) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 121033540 + ... + 121453066.

Almost surely, 2^{50864839177681} is an apocalyptic number.

50864839177681 is the 7131959-th square number.

50864839177681 is the 3565980-th centered octagonal number.

It is an amenable number.

50864839177681 is a deficient number, since it is larger than the sum of its proper divisors (3168181062218).

50864839177681 is an frugal number, since it uses more digits than its factorization.

50864839177681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839088 (or 419544 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 73.

The spelling of 50864839177681 in words is "fifty trillion, eight hundred sixty-four billion, eight hundred thirty-nine million, one hundred seventy-seven thousand, six hundred eighty-one".