1572073663 has 4 divisors (see below), whose sum is σ = 1581160968. Its totient is φ = 1562986360.

The previous prime is 1572073631. The next prime is 1572073697. The reversal of 1572073663 is 3663702751.

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

It is a cyclic number.

It is not a de Polignac number, because 1572073663 - 2⁵ = 1572073631 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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1572073603) 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, 4543393 + ... + 4543738.

It is an arithmetic number, because the mean of its divisors is an integer number (395290242).

Almost surely, 2^1572073663 is an apocalyptic number.

1572073663 is a deficient number, since it is larger than the sum of its proper divisors (9087305).

1572073663 is an equidigital number, since it uses as much as digits as its factorization.

1572073663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9087304.

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 1572073663 is about 39649.3841440192. The cubic root of 1572073663 is about 1162.7623581439.

The spelling of 1572073663 in words is "one billion, five hundred seventy-two million, seventy-three thousand, six hundred sixty-three".