1061155226661 has 32 divisors (see below), whose sum is σ = 1453901581440. Its totient is φ = 688064692224.

The previous prime is 1061155226633. The next prime is 1061155226683. The reversal of 1061155226661 is 1666225511601.

1061155226661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1061155226661 - 2¹⁵ = 1061155193893 is a prime.

It is a super-2 number, since 2×1061155226661² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061155226561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79701541 + ... + 79714853.

It is an arithmetic number, because the mean of its divisors is an integer number (45434424420).

Almost surely, 2^{1061155226661} is an apocalyptic number.

It is an amenable number.

1061155226661 is a deficient number, since it is larger than the sum of its proper divisors (392746354779).

1061155226661 is a wasteful number, since it uses less digits than its factorization.

1061155226661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15925.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 1061155226661 in words is "one trillion, sixty-one billion, one hundred fifty-five million, two hundred twenty-six thousand, six hundred sixty-one".