71663272434 has 24 divisors (see below), whose sum is σ = 167214302892. Its totient is φ = 22050237600.

The previous prime is 71663272423. The next prime is 71663272441. The reversal of 71663272434 is 43427236617.

71663272434 is a `hidden beast` number, since 7 + 1 + 6 + 632 + 7 + 2 + 4 + 3 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61471764225 + 10191508209 = 247935^2 + 100953^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71663272434.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153126417 + ... + 153126884.

Almost surely, 2^71663272434 is an apocalyptic number.

71663272434 is an abundant number, since it is smaller than the sum of its proper divisors (95551030458).

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

71663272434 is a wasteful number, since it uses less digits than its factorization.

71663272434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306253322 (or 306253319 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 45.

The spelling of 71663272434 in words is "seventy-one billion, six hundred sixty-three million, two hundred seventy-two thousand, four hundred thirty-four".