6421120524049 has 27 divisors (see below), whose sum is σ = 8210489782971. Its totient is φ = 5003318498640.

The previous prime is 6421120524047. The next prime is 6421120524059. The reversal of 6421120524049 is 9404250211246.

The square root of 6421120524049 is 2533993.

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., 5500633787649 + 920486736400 = 2345343^2 + 959420^2 .

It is not a de Polignac number, because 6421120524049 - 2¹ = 6421120524047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6421120524043) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 195101007 + ... + 195133915.

Almost surely, 2^{6421120524049} is an apocalyptic number.

6421120524049 is the 2533993-rd square number.

6421120524049 is the 1266997-th centered octagonal number.

It is an amenable number.

6421120524049 is a deficient number, since it is larger than the sum of its proper divisors (1789369258922).

6421120524049 is an frugal number, since it uses more digits than its factorization.

6421120524049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65854 (or 32927 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 6421120524049 in words is "six trillion, four hundred twenty-one billion, one hundred twenty million, five hundred twenty-four thousand, forty-nine".