1444556641 has 16 divisors (see below), whose sum is σ = 1594323648. Its totient is φ = 1297912000.

The previous prime is 1444556621. The next prime is 1444556647. The reversal of 1444556641 is 1466554441.

It is a happy number.

It is not a de Polignac number, because 1444556641 - 2⁹ = 1444556129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1444556594 and 1444556603.

It is not an unprimeable number, because it can be changed into a prime (1444556647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051431 + ... + 1052803.

It is an arithmetic number, because the mean of its divisors is an integer number (99645228).

Almost surely, 2^1444556641 is an apocalyptic number.

1444556641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1444556641 is a deficient number, since it is larger than the sum of its proper divisors (149767007).

1444556641 is a wasteful number, since it uses less digits than its factorization.

1444556641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432.

The product of its digits is 230400, while the sum is 40.

The square root of 1444556641 is about 38007.3235179748. The cubic root of 1444556641 is about 1130.4330814452.

The spelling of 1444556641 in words is "one billion, four hundred forty-four million, five hundred fifty-six thousand, six hundred forty-one".