1651563563 has 4 divisors (see below), whose sum is σ = 1778606928. Its totient is φ = 1524520200.

The previous prime is 1651563539. The next prime is 1651563569. The reversal of 1651563563 is 3653651561.

It is a happy number.

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 1651563563 - 2¹² = 1651559467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1651563563.

It is not an unprimeable number, because it can be changed into a prime (1651563569) 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, 63521663 + ... + 63521688.

It is an arithmetic number, because the mean of its divisors is an integer number (444651732).

Almost surely, 2^1651563563 is an apocalyptic number.

1651563563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1651563563 is a deficient number, since it is larger than the sum of its proper divisors (127043365).

1651563563 is a wasteful number, since it uses less digits than its factorization.

1651563563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127043364.

The product of its digits is 243000, while the sum is 41.

The square root of 1651563563 is about 40639.4335959546. The cubic root of 1651563563 is about 1182.0388869415.

The spelling of 1651563563 in words is "one billion, six hundred fifty-one million, five hundred sixty-three thousand, five hundred sixty-three".