1445665155540 has 24 divisors (see below), whose sum is σ = 4047862435680. Its totient is φ = 385510708128.

The previous prime is 1445665155533. The next prime is 1445665155553. The reversal of 1445665155540 is 455515665441.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12047209570 + ... + 12047209689.

It is an arithmetic number, because the mean of its divisors is an integer number (168660934820).

Almost surely, 2^{1445665155540} is an apocalyptic number.

1445665155540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445665155540 is an abundant number, since it is smaller than the sum of its proper divisors (2602197280140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445665155540 is a wasteful number, since it uses less digits than its factorization.

1445665155540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24094419271 (or 24094419269 counting only the distinct ones).

The product of its (nonzero) digits is 7200000, while the sum is 51.

The spelling of 1445665155540 in words is "one trillion, four hundred forty-five billion, six hundred sixty-five million, one hundred fifty-five thousand, five hundred forty".