1011055550561 has 8 divisors (see below), whose sum is σ = 1156162699584. Its totient is φ = 866116062000.

The previous prime is 1011055550459. The next prime is 1011055550581. The reversal of 1011055550561 is 1650555501101.

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

It is not a de Polignac number, because 1011055550561 - 2¹⁸ = 1011055288417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011055550581) 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, 41902190 + ... + 41926311.

It is an arithmetic number, because the mean of its divisors is an integer number (144520337448).

Almost surely, 2^{1011055550561} is an apocalyptic number.

It is an amenable number.

1011055550561 is a deficient number, since it is larger than the sum of its proper divisors (145107149023).

1011055550561 is an equidigital number, since it uses as much as digits as its factorization.

1011055550561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83830231.

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 1011055550561 in words is "one trillion, eleven billion, fifty-five million, five hundred fifty thousand, five hundred sixty-one".