10245640615321 has 4 divisors (see below), whose sum is σ = 10245648870144. Its totient is φ = 10245632360500.

The previous prime is 10245640615291. The next prime is 10245640615363. The reversal of 10245640615321 is 12351604654201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10245640615321 - 2¹³ = 10245640607129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10245640615381) 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, 1844905 + ... + 4888246.

It is an arithmetic number, because the mean of its divisors is an integer number (2561412217536).

Almost surely, 2^{10245640615321} is an apocalyptic number.

It is an amenable number.

10245640615321 is a deficient number, since it is larger than the sum of its proper divisors (8254823).

10245640615321 is an equidigital number, since it uses as much as digits as its factorization.

10245640615321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8254822.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 10245640615321 in words is "ten trillion, two hundred forty-five billion, six hundred forty million, six hundred fifteen thousand, three hundred twenty-one".