10278021585401 has 4 divisors (see below), whose sum is σ = 10555805952612. Its totient is φ = 10000237218192.

The previous prime is 10278021585397. The next prime is 10278021585421. The reversal of 10278021585401 is 10458512087201.

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 4860486031801 + 5417535553600 = 2204651^2 + 2327560^2 .

It is a cyclic number.

It is not a de Polignac number, because 10278021585401 - 2² = 10278021585397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10278021585421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138892183550 + ... + 138892183623.

It is an arithmetic number, because the mean of its divisors is an integer number (2638951488153).

Almost surely, 2^{10278021585401} is an apocalyptic number.

It is an amenable number.

10278021585401 is a deficient number, since it is larger than the sum of its proper divisors (277784367211).

10278021585401 is an equidigital number, since it uses as much as digits as its factorization.

10278021585401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277784367210.

The product of its (nonzero) digits is 179200, while the sum is 44.

The spelling of 10278021585401 in words is "ten trillion, two hundred seventy-eight billion, twenty-one million, five hundred eighty-five thousand, four hundred one".