202744385127421 has 8 divisors (see below), whose sum is σ = 222072957340920. Its totient is φ = 184238305348608.

The previous prime is 202744385127419. The next prime is 202744385127437. The reversal of 202744385127421 is 124721583447202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42235883179396 + 160508501948025 = 6498914^2 + 12669195^2 .

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 202744385127421 - 2¹ = 202744385127419 is a prime.

It is a super-4 number, since 4×202744385127421⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202744385127121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205623108156 + ... + 205623109141.

It is an arithmetic number, because the mean of its divisors is an integer number (27759119667615).

Almost surely, 2^{202744385127421} is an apocalyptic number.

It is an amenable number.

202744385127421 is a deficient number, since it is larger than the sum of its proper divisors (19328572213499).

202744385127421 is a wasteful number, since it uses less digits than its factorization.

202744385127421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411246217343.

The product of its (nonzero) digits is 6021120, while the sum is 52.

The spelling of 202744385127421 in words is "two hundred two trillion, seven hundred forty-four billion, three hundred eighty-five million, one hundred twenty-seven thousand, four hundred twenty-one".