71242533999 has 48 divisors (see below), whose sum is σ = 126727025152. Its totient is φ = 37556633664.

The previous prime is 71242533959. The next prime is 71242534003. The reversal of 71242533999 is 99933524217.

71242533999 is a `hidden beast` number, since 7 + 1 + 242 + 5 + 3 + 399 + 9 = 666.

It is not a de Polignac number, because 71242533999 - 2⁹ = 71242533487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71242533949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1435884 + ... + 1484670.

Almost surely, 2^71242533999 is an apocalyptic number.

71242533999 is a deficient number, since it is larger than the sum of its proper divisors (55484491153).

71242533999 is a wasteful number, since it uses less digits than its factorization.

71242533999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50596 (or 50593 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The spelling of 71242533999 in words is "seventy-one billion, two hundred forty-two million, five hundred thirty-three thousand, nine hundred ninety-nine".