1445168551 has 4 divisors (see below), whose sum is σ = 1456200504. Its totient is φ = 1434136600.

The previous prime is 1445168539. The next prime is 1445168587. The reversal of 1445168551 is 1558615441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1558615441 = 113 ⋅13793057.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445168551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445168051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5515780 + ... + 5516041.

It is an arithmetic number, because the mean of its divisors is an integer number (364050126).

Almost surely, 2^1445168551 is an apocalyptic number.

1445168551 is a deficient number, since it is larger than the sum of its proper divisors (11031953).

1445168551 is a wasteful number, since it uses less digits than its factorization.

1445168551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11031952.

The product of its digits is 96000, while the sum is 40.

The square root of 1445168551 is about 38015.3725616362. The cubic root of 1445168551 is about 1130.5926749701.

The spelling of 1445168551 in words is "one billion, four hundred forty-five million, one hundred sixty-eight thousand, five hundred fifty-one".