1961226603 has 24 divisors (see below), whose sum is σ = 3312877568. Its totient is φ = 1094636592.

The previous prime is 1961226581. The next prime is 1961226637. The reversal of 1961226603 is 3066221691.

It is a happy number.

1961226603 is a `hidden beast` number, since 19 + 6 + 12 + 26 + 603 = 666.

It is not a de Polignac number, because 1961226603 - 2⁵ = 1961226571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1961226803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359275 + ... + 364692.

Almost surely, 2^1961226603 is an apocalyptic number.

1961226603 is a deficient number, since it is larger than the sum of its proper divisors (1351650965).

1961226603 is a wasteful number, since it uses less digits than its factorization.

1961226603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724023 (or 724020 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1961226603 is about 44285.7381444636. The cubic root of 1961226603 is about 1251.7259577324.

The spelling of 1961226603 in words is "one billion, nine hundred sixty-one million, two hundred twenty-six thousand, six hundred three".