549107677421 has 16 divisors (see below), whose sum is σ = 595657949040. Its totient is φ = 504143646720.

The previous prime is 549107677403. The next prime is 549107677423. The reversal of 549107677421 is 124776701945.

It can be written as a sum of positive squares in 8 ways, for example, as 5328270025 + 543779407396 = 72995^2 + 737414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549107677421 is a prime.

It is a super-2 number, since 2×549107677421² (a number of 24 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 (549107677423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6670505 + ... + 6752321.

It is an arithmetic number, because the mean of its divisors is an integer number (37228621815).

Almost surely, 2^549107677421 is an apocalyptic number.

It is an amenable number.

549107677421 is a deficient number, since it is larger than the sum of its proper divisors (46550271619).

549107677421 is a wasteful number, since it uses less digits than its factorization.

549107677421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91504.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 549107677421 in words is "five hundred forty-nine billion, one hundred seven million, six hundred seventy-seven thousand, four hundred twenty-one".