71737757397 has 12 divisors (see below), whose sum is σ = 104006417580. Its totient is φ = 47647381248.

The previous prime is 71737757393. The next prime is 71737757437. The reversal of 71737757397 is 79375773717.

71737757397 is a `hidden beast` number, since 7 + 173 + 7 + 75 + 7 + 397 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32673816081 + 39063941316 = 180759^2 + 197646^2 .

It is not a de Polignac number, because 71737757397 - 2² = 71737757393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71737757393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14813308 + ... + 14818149.

It is an arithmetic number, because the mean of its divisors is an integer number (8667201465).

Almost surely, 2^71737757397 is an apocalyptic number.

It is an amenable number.

71737757397 is a deficient number, since it is larger than the sum of its proper divisors (32268660183).

71737757397 is a wasteful number, since it uses less digits than its factorization.

71737757397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29631732 (or 29631729 counting only the distinct ones).

The product of its digits is 47647845, while the sum is 63.

The spelling of 71737757397 in words is "seventy-one billion, seven hundred thirty-seven million, seven hundred fifty-seven thousand, three hundred ninety-seven".