1153560621561 has 8 divisors (see below), whose sum is σ = 1541446434144. Its totient is φ = 767357611680.

The previous prime is 1153560621553. The next prime is 1153560621571. The reversal of 1153560621561 is 1651260653511.

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

It is not a de Polignac number, because 1153560621561 - 2³ = 1153560621553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1153560621571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420699075 + ... + 420701816.

It is an arithmetic number, because the mean of its divisors is an integer number (192680804268).

Almost surely, 2^{1153560621561} is an apocalyptic number.

It is an amenable number.

1153560621561 is a deficient number, since it is larger than the sum of its proper divisors (387885812583).

1153560621561 is an equidigital number, since it uses as much as digits as its factorization.

1153560621561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841401351.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 1153560621561 in words is "one trillion, one hundred fifty-three billion, five hundred sixty million, six hundred twenty-one thousand, five hundred sixty-one".