1445605641 has 12 divisors (see below), whose sum is σ = 2116702068. Its totient is φ = 950534784.

The previous prime is 1445605639. The next prime is 1445605643. The reversal of 1445605641 is 1465065441.

1445605641 is a `hidden beast` number, since 1 + 4 + 4 + 5 + 6 + 0 + 5 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (1445605639) and next prime (1445605643).

It can be written as a sum of positive squares in 2 ways, for example, as 1246372416 + 199233225 = 35304^2 + 14115^2 .

It is not a de Polignac number, because 1445605641 - 2¹ = 1445605639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1445605596 and 1445605605.

It is not an unprimeable number, because it can be changed into a prime (1445605643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1099500 + ... + 1100813.

It is an arithmetic number, because the mean of its divisors is an integer number (176391839).

Almost surely, 2^1445605641 is an apocalyptic number.

It is an amenable number.

1445605641 is a deficient number, since it is larger than the sum of its proper divisors (671096427).

1445605641 is a wasteful number, since it uses less digits than its factorization.

1445605641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200392 (or 2200389 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1445605641 is about 38021.1209855785. The cubic root of 1445605641 is about 1130.7066457453.

The spelling of 1445605641 in words is "one billion, four hundred forty-five million, six hundred five thousand, six hundred forty-one".