71111993071 has 16 divisors (see below), whose sum is σ = 81910640448. Its totient is φ = 60475161600.

The previous prime is 71111993033. The next prime is 71111993111. The reversal of 71111993071 is 17039911117.

It is not a de Polignac number, because 71111993071 - 2¹¹ = 71111991023 is a prime.

It is a super-2 number, since 2×71111993071² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71111993011) 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, 380731 + ... + 535891.

It is an arithmetic number, because the mean of its divisors is an integer number (5119415028).

Almost surely, 2^71111993071 is an apocalyptic number.

71111993071 is a deficient number, since it is larger than the sum of its proper divisors (10798647377).

71111993071 is a wasteful number, since it uses less digits than its factorization.

71111993071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155682.

The product of its (nonzero) digits is 11907, while the sum is 40.

The spelling of 71111993071 in words is "seventy-one billion, one hundred eleven million, nine hundred ninety-three thousand, seventy-one".