4129662072649 has 3 divisors (see below), whose sum is σ = 4129664104807. Its totient is φ = 4129660040492.

The previous prime is 4129662072617. The next prime is 4129662072689. The reversal of 4129662072649 is 9462702669214.

The square root of 4129662072649 is 2032157.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3867653223225 + 262008849424 = 1966635^2 + 511868^2 .

It is not a de Polignac number, because 4129662072649 - 2⁵ = 4129662072617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4129662072593 and 4129662072602.

It is not an unprimeable number, because it can be changed into a prime (4129662072689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1016079 + ... + 3048235.

Almost surely, 2^{4129662072649} is an apocalyptic number.

4129662072649 is the 2032157-th square number.

4129662072649 is the 1016079-th centered octagonal number.

It is an amenable number.

4129662072649 is a deficient number, since it is larger than the sum of its proper divisors (2032158).

4129662072649 is an frugal number, since it uses more digits than its factorization.

4129662072649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064314 (or 2032157 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 58.

The spelling of 4129662072649 in words is "four trillion, one hundred twenty-nine billion, six hundred sixty-two million, seventy-two thousand, six hundred forty-nine".