444537136163545 has 16 divisors (see below), whose sum is σ = 533601214470288. Its totient is φ = 355525289620480.

The previous prime is 444537136163531. The next prime is 444537136163581. The reversal of 444537136163545 is 545361631735444.

It can be written as a sum of positive squares in 8 ways, for example, as 19682097475401 + 424855038688144 = 4436451^2 + 20612012^2 .

It is a de Polignac number, because none of the positive numbers 2^k-444537136163545 is a prime.

It is a super-2 number, since 2×444537136163545² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242252085 + ... + 244080205.

It is an arithmetic number, because the mean of its divisors is an integer number (33350075904393).

Almost surely, 2^{444537136163545} is an apocalyptic number.

It is an amenable number.

444537136163545 is a deficient number, since it is larger than the sum of its proper divisors (89064078306743).

444537136163545 is a wasteful number, since it uses less digits than its factorization.

444537136163545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842380.

The product of its digits is 217728000, while the sum is 61.

Adding to 444537136163545 its reverse (545361631735444), we get a palindrome (989898767898989).

The spelling of 444537136163545 in words is "four hundred forty-four trillion, five hundred thirty-seven billion, one hundred thirty-six million, one hundred sixty-three thousand, five hundred forty-five".