1546481945 has 4 divisors (see below), whose sum is σ = 1855778340. Its totient is φ = 1237185552.

The previous prime is 1546481941. The next prime is 1546481947. The reversal of 1546481945 is 5491846451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 958273936 + 588208009 = 30956^2 + 24253^2 .

It is a cyclic number.

It is not a de Polignac number, because 1546481945 - 2² = 1546481941 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1546481945.

It is not an unprimeable number, because it can be changed into a prime (1546481941) 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, 154648190 + ... + 154648199.

It is an arithmetic number, because the mean of its divisors is an integer number (463944585).

Almost surely, 2^1546481945 is an apocalyptic number.

It is an amenable number.

1546481945 is a deficient number, since it is larger than the sum of its proper divisors (309296395).

1546481945 is an equidigital number, since it uses as much as digits as its factorization.

1546481945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309296394.

The product of its digits is 691200, while the sum is 47.

The square root of 1546481945 is about 39325.3346457471. The cubic root of 1546481945 is about 1156.4182885510.

The spelling of 1546481945 in words is "one billion, five hundred forty-six million, four hundred eighty-one thousand, nine hundred forty-five".