71172909111 has 8 divisors (see below), whose sum is σ = 94898663424. Its totient is φ = 47447880440.

The previous prime is 71172909103. The next prime is 71172909149. The reversal of 71172909111 is 11190927117.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71172909111 - 2³ = 71172909103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71172909111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71172959111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118090 + ... + 395336.

It is an arithmetic number, because the mean of its divisors is an integer number (11862332928).

Almost surely, 2^71172909111 is an apocalyptic number.

71172909111 is a deficient number, since it is larger than the sum of its proper divisors (23725754313).

71172909111 is a wasteful number, since it uses less digits than its factorization.

71172909111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362821.

The product of its (nonzero) digits is 7938, while the sum is 39.

The spelling of 71172909111 in words is "seventy-one billion, one hundred seventy-two million, nine hundred nine thousand, one hundred eleven".