245821620001 has 4 divisors (see below), whose sum is σ = 249490599472. Its totient is φ = 242152640532.

The previous prime is 245821619999. The next prime is 245821620017. The reversal of 245821620001 is 100026128542.

245821620001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 100026128542 = 2 ⋅50013064271.

It is a cyclic number.

It is not a de Polignac number, because 245821620001 - 2¹ = 245821619999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245821620701) 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 3 ways as a sum of consecutive naturals, for example, 1834489635 + ... + 1834489768.

It is an arithmetic number, because the mean of its divisors is an integer number (62372649868).

Almost surely, 2^245821620001 is an apocalyptic number.

It is an amenable number.

245821620001 is a deficient number, since it is larger than the sum of its proper divisors (3668979471).

245821620001 is an equidigital number, since it uses as much as digits as its factorization.

245821620001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668979470.

The product of its (nonzero) digits is 7680, while the sum is 31.

Adding to 245821620001 its reverse (100026128542), we get a palindrome (345847748543).

The spelling of 245821620001 in words is "two hundred forty-five billion, eight hundred twenty-one million, six hundred twenty thousand, one".