1461555563 has 8 divisors (see below), whose sum is σ = 1656824400. Its totient is φ = 1278121248.

The previous prime is 1461555553. The next prime is 1461555581. The reversal of 1461555563 is 3655551641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1461555563 - 2⁸ = 1461555307 is a prime.

It is a super-2 number, since 2×1461555563² = 4272289327472493938, which contains 22 as substring.

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 1461555563.

It is not an unprimeable number, because it can be changed into a prime (1461555523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2958368 + ... + 2958861.

It is an arithmetic number, because the mean of its divisors is an integer number (207103050).

Almost surely, 2^1461555563 is an apocalyptic number.

1461555563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1461555563 is a deficient number, since it is larger than the sum of its proper divisors (195268837).

1461555563 is a wasteful number, since it uses less digits than its factorization.

1461555563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917261.

The product of its digits is 270000, while the sum is 41.

The square root of 1461555563 is about 38230.2964021991. The cubic root of 1461555563 is about 1134.8499515073.

The spelling of 1461555563 in words is "one billion, four hundred sixty-one million, five hundred fifty-five thousand, five hundred sixty-three".