1945663146 has 64 divisors (see below), whose sum is σ = 4961295360. Its totient is φ = 553662000.

The previous prime is 1945663133. The next prime is 1945663147. The reversal of 1945663146 is 6413665491.

1945663146 is a `hidden beast` number, since 1 + 9 + 4 + 5 + 6 + 631 + 4 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (1945663147) 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 31 ways as a sum of consecutive naturals, for example, 84625 + ... + 105131.

It is an arithmetic number, because the mean of its divisors is an integer number (77520240).

Almost surely, 2^1945663146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1945663146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2480647680).

1945663146 is an abundant number, since it is smaller than the sum of its proper divisors (3015632214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1945663146 is a wasteful number, since it uses less digits than its factorization.

1945663146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20776 (or 20770 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 1945663146 is about 44109.6717965573. The cubic root of 1945663146 is about 1248.4061062794.

The spelling of 1945663146 in words is "one billion, nine hundred forty-five million, six hundred sixty-three thousand, one hundred forty-six".