6450939616901 has 16 divisors (see below), whose sum is σ = 7020786507504. Its totient is φ = 5891644975104.

The previous prime is 6450939616871. The next prime is 6450939616903. The reversal of 6450939616901 is 1096169390546.

It is a Cunningham number, because it is equal to 2539870²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 235137708100 + 6215801908801 = 484910^2 + 2493151^2 .

It is a cyclic number.

It is not a de Polignac number, because 6450939616901 - 2¹⁴ = 6450939600517 is a prime.

It is a super-2 number, since 2×6450939616901² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450939616903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3707651 + ... + 5162223.

It is an arithmetic number, because the mean of its divisors is an integer number (438799156719).

Almost surely, 2^{6450939616901} is an apocalyptic number.

It is an amenable number.

6450939616901 is a deficient number, since it is larger than the sum of its proper divisors (569846890603).

6450939616901 is a wasteful number, since it uses less digits than its factorization.

6450939616901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458200.

The product of its (nonzero) digits is 9447840, while the sum is 59.

The spelling of 6450939616901 in words is "six trillion, four hundred fifty billion, nine hundred thirty-nine million, six hundred sixteen thousand, nine hundred one".