1961666548226 has 32 divisors (see below), whose sum is σ = 3668704745472. Its totient is φ = 764257847760.

The previous prime is 1961666548133. The next prime is 1961666548253. The reversal of 1961666548226 is 6228456661691.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4299185 + ... + 4733531.

It is an arithmetic number, because the mean of its divisors is an integer number (114647023296).

Almost surely, 2^{1961666548226} is an apocalyptic number.

1961666548226 is a deficient number, since it is larger than the sum of its proper divisors (1707038197246).

1961666548226 is a wasteful number, since it uses less digits than its factorization.

1961666548226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463694.

The product of its digits is 44789760, while the sum is 62.

The spelling of 1961666548226 in words is "one trillion, nine hundred sixty-one billion, six hundred sixty-six million, five hundred forty-eight thousand, two hundred twenty-six".