549995806261 has 8 divisors (see below), whose sum is σ = 602685990144. Its totient is φ = 497754049920.

The previous prime is 549995806259. The next prime is 549995806291. The reversal of 549995806261 is 162608599945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549995806261 - 2¹ = 549995806259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 549995806193 and 549995806202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549995806291) 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 7 ways as a sum of consecutive naturals, for example, 112104316 + ... + 112109221.

It is an arithmetic number, because the mean of its divisors is an integer number (75335748768).

Almost surely, 2^549995806261 is an apocalyptic number.

It is an amenable number.

549995806261 is a deficient number, since it is larger than the sum of its proper divisors (52690183883).

549995806261 is a wasteful number, since it uses less digits than its factorization.

549995806261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224213771.

The product of its (nonzero) digits is 41990400, while the sum is 64.

The spelling of 549995806261 in words is "five hundred forty-nine billion, nine hundred ninety-five million, eight hundred six thousand, two hundred sixty-one".