11415013561 has 8 divisors (see below), whose sum is σ = 13053449024. Its totient is φ = 9778507920.

The previous prime is 11415013529. The next prime is 11415013573. The reversal of 11415013561 is 16531051411.

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 11415013561 - 2⁵ = 11415013529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11415013061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469755 + ... + 493456.

It is an arithmetic number, because the mean of its divisors is an integer number (1631681128).

Almost surely, 2^11415013561 is an apocalyptic number.

It is an amenable number.

11415013561 is a deficient number, since it is larger than the sum of its proper divisors (1638435463).

11415013561 is an equidigital number, since it uses as much as digits as its factorization.

11415013561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964911.

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 11415013561 its reverse (16531051411), we get a palindrome (27946064972).

The spelling of 11415013561 in words is "eleven billion, four hundred fifteen million, thirteen thousand, five hundred sixty-one".