1940256563 has 16 divisors (see below), whose sum is σ = 2449958400. Its totient is φ = 1497192576.

The previous prime is 1940256557. The next prime is 1940256569. The reversal of 1940256563 is 3656520491.

It is an interprime number because it is at equal distance from previous prime (1940256557) and next prime (1940256569).

It is a cyclic number.

It is not a de Polignac number, because 1940256563 - 2⁶ = 1940256499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1940256563.

It is not an unprimeable number, because it can be changed into a prime (1940256569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351713 + ... + 357186.

It is an arithmetic number, because the mean of its divisors is an integer number (153122400).

Almost surely, 2^1940256563 is an apocalyptic number.

1940256563 is a deficient number, since it is larger than the sum of its proper divisors (509701837).

1940256563 is a wasteful number, since it uses less digits than its factorization.

1940256563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708946.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 1940256563 is about 44048.3434762307. The cubic root of 1940256563 is about 1247.2486820828.

The spelling of 1940256563 in words is "one billion, nine hundred forty million, two hundred fifty-six thousand, five hundred sixty-three".