1061615563 has 4 divisors (see below), whose sum is σ = 1063076560. Its totient is φ = 1060154568.

The previous prime is 1061615551. The next prime is 1061615579. The reversal of 1061615563 is 3655161601.

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 1061615563 - 2²⁵ = 1028061131 is a prime.

It is a super-2 number, since 2×1061615563² = 2254055207207613938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061615593) 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, 729408 + ... + 730861.

It is an arithmetic number, because the mean of its divisors is an integer number (265769140).

Almost surely, 2^1061615563 is an apocalyptic number.

1061615563 is a deficient number, since it is larger than the sum of its proper divisors (1460997).

1061615563 is an equidigital number, since it uses as much as digits as its factorization.

1061615563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460996.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 1061615563 is about 32582.4425573038. The cubic root of 1061615563 is about 1020.1305622310.

The spelling of 1061615563 in words is "one billion, sixty-one million, six hundred fifteen thousand, five hundred sixty-three".