1543690545 has 16 divisors (see below), whose sum is σ = 2473495872. Its totient is φ = 822104640.

The previous prime is 1543690529. The next prime is 1543690613. The reversal of 1543690545 is 5450963451.

It is not a de Polignac number, because 1543690545 - 2⁴ = 1543690529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1543690497 and 1543690506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64102 + ... + 84831.

It is an arithmetic number, because the mean of its divisors is an integer number (154593492).

Almost surely, 2^1543690545 is an apocalyptic number.

1543690545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1543690545 is a deficient number, since it is larger than the sum of its proper divisors (929805327).

1543690545 is a wasteful number, since it uses less digits than its factorization.

1543690545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149632.

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 1543690545 is about 39289.8275002576. The cubic root of 1543690545 is about 1155.7220911448.

The spelling of 1543690545 in words is "one billion, five hundred forty-three million, six hundred ninety thousand, five hundred forty-five".