1019536561 has 6 divisors (see below), whose sum is σ = 1076020962. Its totient is φ = 965876400.

The previous prime is 1019536541. The next prime is 1019536621. The reversal of 1019536561 is 1656359101.

1019536561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 632824336 + 386712225 = 25156^2 + 19665^2 .

It is not a de Polignac number, because 1019536561 - 2¹¹ = 1019534513 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 1019536561.

It is not an unprimeable number, because it can be changed into a prime (1019536541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1411740 + ... + 1412461.

It is an arithmetic number, because the mean of its divisors is an integer number (179336827).

Almost surely, 2^1019536561 is an apocalyptic number.

It is an amenable number.

1019536561 is a deficient number, since it is larger than the sum of its proper divisors (56484401).

1019536561 is an equidigital number, since it uses as much as digits as its factorization.

1019536561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824239 (or 2824220 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1019536561 is about 31930.1826020460. The cubic root of 1019536561 is about 1006.4702327978.

The spelling of 1019536561 in words is "one billion, nineteen million, five hundred thirty-six thousand, five hundred sixty-one".