1445555649 has 16 divisors (see below), whose sum is σ = 1943928000. Its totient is φ = 955475136.

The previous prime is 1445555623. The next prime is 1445555653. The reversal of 1445555649 is 9465555441.

It is not a de Polignac number, because 1445555649 - 2⁸ = 1445555393 is a prime.

It is a super-2 number, since 2×1445555649² = 4179262268711622402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1445555598 and 1445555607.

It is not an unprimeable number, because it can be changed into a prime (1445555689) 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, 193027 + ... + 200375.

It is an arithmetic number, because the mean of its divisors is an integer number (121495500).

Almost surely, 2^1445555649 is an apocalyptic number.

It is an amenable number.

1445555649 is a deficient number, since it is larger than the sum of its proper divisors (498372351).

1445555649 is a wasteful number, since it uses less digits than its factorization.

1445555649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7904.

The product of its digits is 2160000, while the sum is 48.

The square root of 1445555649 is about 38020.4635558274. The cubic root of 1445555649 is about 1130.6936115456.

The spelling of 1445555649 in words is "one billion, four hundred forty-five million, five hundred fifty-five thousand, six hundred forty-nine".