105523455661 has 8 divisors (see below), whose sum is σ = 116412368184. Its totient is φ = 95030503680.

The previous prime is 105523455643. The next prime is 105523455701. The reversal of 105523455661 is 166554325501.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5901158761 + 99622296900 = 76819^2 + 315630^2 .

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 105523455661 - 2¹⁷ = 105523324589 is a prime.

It is a super-2 number, since 2×105523455661² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105523455761) 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, 98989576 + ... + 98990641.

It is an arithmetic number, because the mean of its divisors is an integer number (14551546023).

Almost surely, 2^105523455661 is an apocalyptic number.

It is an amenable number.

105523455661 is a deficient number, since it is larger than the sum of its proper divisors (10888912523).

105523455661 is a wasteful number, since it uses less digits than its factorization.

105523455661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197980271.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 105523455661 in words is "one hundred five billion, five hundred twenty-three million, four hundred fifty-five thousand, six hundred sixty-one".