1050055011561 has 4 divisors (see below), whose sum is σ = 1400073348752. Its totient is φ = 700036674372.

The previous prime is 1050055011559. The next prime is 1050055011589. The reversal of 1050055011561 is 1651105500501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1050055011561 - 2¹ = 1050055011559 is a prime.

It is a super-2 number, since 2×1050055011561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1050055011521) 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, 175009168591 + ... + 175009168596.

It is an arithmetic number, because the mean of its divisors is an integer number (350018337188).

Almost surely, 2^{1050055011561} is an apocalyptic number.

It is an amenable number.

1050055011561 is a deficient number, since it is larger than the sum of its proper divisors (350018337191).

1050055011561 is an equidigital number, since it uses as much as digits as its factorization.

1050055011561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350018337190.

The product of its (nonzero) digits is 3750, while the sum is 30.

The spelling of 1050055011561 in words is "one trillion, fifty billion, fifty-five million, eleven thousand, five hundred sixty-one".