20444544561455 has 64 divisors (see below), whose sum is σ = 29313951744000. Its totient is φ = 13675246018560.

The previous prime is 20444544561449. The next prime is 20444544561517. The reversal of 20444544561455 is 55416544544402.

It is not a de Polignac number, because 20444544561455 - 2⁴ = 20444544561439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20444544561397 and 20444544561406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56529650 + ... + 56890160.

It is an arithmetic number, because the mean of its divisors is an integer number (458030496000).

Almost surely, 2^{20444544561455} is an apocalyptic number.

20444544561455 is a deficient number, since it is larger than the sum of its proper divisors (8869407182545).

20444544561455 is an equidigital number, since it uses as much as digits as its factorization.

20444544561455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361349 (or 361335 counting only the distinct ones).

The product of its (nonzero) digits is 30720000, while the sum is 53.

The spelling of 20444544561455 in words is "twenty trillion, four hundred forty-four billion, five hundred forty-four million, five hundred sixty-one thousand, four hundred fifty-five".