1540073945 has 16 divisors (see below), whose sum is σ = 1958195088. Its totient is φ = 1158758400.

The previous prime is 1540073933. The next prime is 1540073963. The reversal of 1540073945 is 5493700451.

It can be written as a sum of positive squares in 8 ways, for example, as 719366041 + 820707904 = 26821^2 + 28648^2 .

It is not a de Polignac number, because 1540073945 - 2⁴ = 1540073929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1540073899 and 1540073908.

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 15 ways as a sum of consecutive naturals, for example, 130427 + ... + 141743.

It is an arithmetic number, because the mean of its divisors is an integer number (122387193).

Almost surely, 2^1540073945 is an apocalyptic number.

It is an amenable number.

1540073945 is a deficient number, since it is larger than the sum of its proper divisors (418121143).

1540073945 is a wasteful number, since it uses less digits than its factorization.

1540073945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12940.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1540073945 is about 39243.7758759271. The cubic root of 1540073945 is about 1154.8188330502.

The spelling of 1540073945 in words is "one billion, five hundred forty million, seventy-three thousand, nine hundred forty-five".