1578153145 has 4 divisors (see below), whose sum is σ = 1893783780. Its totient is φ = 1262522512.

The previous prime is 1578153133. The next prime is 1578153289. The reversal of 1578153145 is 5413518751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5413518751 = 521 ⋅10390631.

It can be written as a sum of positive squares in 2 ways, for example, as 354832569 + 1223320576 = 18837^2 + 34976^2 .

It is a cyclic number.

It is not a de Polignac number, because 1578153145 - 2¹¹ = 1578151097 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1578153098 and 1578153107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157815310 + ... + 157815319.

It is an arithmetic number, because the mean of its divisors is an integer number (473445945).

Almost surely, 2^1578153145 is an apocalyptic number.

It is an amenable number.

1578153145 is a deficient number, since it is larger than the sum of its proper divisors (315630635).

1578153145 is an equidigital number, since it uses as much as digits as its factorization.

1578153145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315630634.

The product of its digits is 84000, while the sum is 40.

The square root of 1578153145 is about 39725.9756960103. The cubic root of 1578153145 is about 1164.2592981789.

The spelling of 1578153145 in words is "one billion, five hundred seventy-eight million, one hundred fifty-three thousand, one hundred forty-five".