1445681272158 has 48 divisors (see below), whose sum is σ = 3137636488896. Its totient is φ = 481074534720.

The previous prime is 1445681272117. The next prime is 1445681272223. The reversal of 1445681272158 is 8512721865441.

1445681272158 is a `hidden beast` number, since 1 + 4 + 4 + 568 + 1 + 2 + 7 + 21 + 58 = 666.

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 23 ways as a sum of consecutive naturals, for example, 69583860 + ... + 69604632.

It is an arithmetic number, because the mean of its divisors is an integer number (65367426852).

Almost surely, 2^{1445681272158} is an apocalyptic number.

1445681272158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1445681272158 is an abundant number, since it is smaller than the sum of its proper divisors (1691955216738).

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

1445681272158 is a wasteful number, since it uses less digits than its factorization.

1445681272158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27169 (or 27166 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 54.

The spelling of 1445681272158 in words is "one trillion, four hundred forty-five billion, six hundred eighty-one million, two hundred seventy-two thousand, one hundred fifty-eight".