71457726197 has 16 divisors (see below), whose sum is σ = 83982951360. Its totient is φ = 59941228800.

The previous prime is 71457726187. The next prime is 71457726217. The reversal of 71457726197 is 79162775417.

It is a cyclic number.

It is not a de Polignac number, because 71457726197 - 2¹⁶ = 71457660661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71457726187) 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, 277322 + ... + 468852.

It is an arithmetic number, because the mean of its divisors is an integer number (5248934460).

Almost surely, 2^71457726197 is an apocalyptic number.

It is an amenable number.

71457726197 is a deficient number, since it is larger than the sum of its proper divisors (12525225163).

71457726197 is a wasteful number, since it uses less digits than its factorization.

71457726197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194164.

The product of its digits is 5186160, while the sum is 56.

The spelling of 71457726197 in words is "seventy-one billion, four hundred fifty-seven million, seven hundred twenty-six thousand, one hundred ninety-seven".