90381400280321 has 4 divisors (see below), whose sum is σ = 92585824677444. Its totient is φ = 88176975883200.

The previous prime is 90381400280293. The next prime is 90381400280323. The reversal of 90381400280321 is 12308200418309.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25215110746225 + 65166289534096 = 5021465^2 + 8072564^2 .

It is a cyclic number.

It is not a de Polignac number, because 90381400280321 - 2¹⁸ = 90381400018177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 2204424397081 = 90381400280321 / (9 + 0 + 3 + 8 + 1 + 4 + 0 + 0 + 2 + 8 + 0 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90381400280323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1102212198500 + ... + 1102212198581.

It is an arithmetic number, because the mean of its divisors is an integer number (23146456169361).

Almost surely, 2^{90381400280321} is an apocalyptic number.

It is an amenable number.

90381400280321 is a deficient number, since it is larger than the sum of its proper divisors (2204424397123).

90381400280321 is a wasteful number, since it uses less digits than its factorization.

90381400280321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204424397122.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 90381400280321 in words is "ninety trillion, three hundred eighty-one billion, four hundred million, two hundred eighty thousand, three hundred twenty-one".