1351615663 has 4 divisors (see below), whose sum is σ = 1352022840. Its totient is φ = 1351208488.

The previous prime is 1351615637. The next prime is 1351615679. The reversal of 1351615663 is 3665161531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3665161531 = 233 ⋅15730307.

It is a cyclic number.

It is not a de Polignac number, because 1351615663 - 2¹⁷ = 1351484591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351115663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198568 + ... + 205261.

It is an arithmetic number, because the mean of its divisors is an integer number (338005710).

Almost surely, 2^1351615663 is an apocalyptic number.

1351615663 is a deficient number, since it is larger than the sum of its proper divisors (407177).

1351615663 is an equidigital number, since it uses as much as digits as its factorization.

1351615663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407176.

The product of its digits is 48600, while the sum is 37.

The square root of 1351615663 is about 36764.3259560134. The cubic root of 1351615663 is about 1105.6501740716.

The spelling of 1351615663 in words is "one billion, three hundred fifty-one million, six hundred fifteen thousand, six hundred sixty-three".