71984956563 has 24 divisors (see below), whose sum is σ = 115588753280. Its totient is φ = 42869450880.

The previous prime is 71984956559. The next prime is 71984956567. The reversal of 71984956563 is 36565948917.

71984956563 is a `hidden beast` number, since 7 + 1 + 9 + 8 + 4 + 9 + 565 + 63 = 666.

It is an interprime number because it is at equal distance from previous prime (71984956559) and next prime (71984956567).

It is not a de Polignac number, because 71984956563 - 2² = 71984956559 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 71984956563.

It is not an unprimeable number, because it can be changed into a prime (71984956567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9919858 + ... + 9927111.

Almost surely, 2^71984956563 is an apocalyptic number.

71984956563 is a deficient number, since it is larger than the sum of its proper divisors (43603796717).

71984956563 is a wasteful number, since it uses less digits than its factorization.

71984956563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19847019 (or 19847016 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The spelling of 71984956563 in words is "seventy-one billion, nine hundred eighty-four million, nine hundred fifty-six thousand, five hundred sixty-three".