1963661427 has 192 divisors, whose sum is σ = 3922329600. Its totient is φ = 960180480.

The previous prime is 1963661407. The next prime is 1963661437. The reversal of 1963661427 is 7241663691.

1963661427 is a `hidden beast` number, since 1 + 9 + 6 + 3 + 6 + 614 + 27 = 666.

It is not a de Polignac number, because 1963661427 - 2⁸ = 1963661171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1963661407) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 15461838 + ... + 15461964.

It is an arithmetic number, because the mean of its divisors is an integer number (20428800).

Almost surely, 2^1963661427 is an apocalyptic number.

1963661427 is a deficient number, since it is larger than the sum of its proper divisors (1958668173).

1963661427 is a wasteful number, since it uses less digits than its factorization.

1963661427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 210 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1963661427 is about 44313.2195512806. The cubic root of 1963661427 is about 1252.2437411840.

The spelling of 1963661427 in words is "one billion, nine hundred sixty-three million, six hundred sixty-one thousand, four hundred twenty-seven".