1581653045 has 16 divisors (see below), whose sum is σ = 2170240128. Its totient is φ = 1084004160.

The previous prime is 1581653039. The next prime is 1581653093. The reversal of 1581653045 is 5403561851.

It is a de Polignac number, because none of the positive numbers 2^k-1581653045 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64382 + ... + 85488.

It is an arithmetic number, because the mean of its divisors is an integer number (135640008).

Almost surely, 2^1581653045 is an apocalyptic number.

It is an amenable number.

1581653045 is a deficient number, since it is larger than the sum of its proper divisors (588587083).

1581653045 is a wasteful number, since it uses less digits than its factorization.

1581653045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23260.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 1581653045 is about 39770.0018229821. The cubic root of 1581653045 is about 1165.1193293255.

The spelling of 1581653045 in words is "one billion, five hundred eighty-one million, six hundred fifty-three thousand, forty-five".