71601703749 has 12 divisors (see below), whose sum is σ = 106760963712. Its totient is φ = 46194647400.

The previous prime is 71601703727. The next prime is 71601703757. The reversal of 71601703749 is 94730710617.

It is a happy number.

71601703749 is a `hidden beast` number, since 7 + 1 + 601 + 7 + 0 + 37 + 4 + 9 = 666.

It is not a de Polignac number, because 71601703749 - 2²⁰ = 71600655173 is a prime.

It is a super-3 number, since 3×71601703749³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71601703709) 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, 128318187 + ... + 128318744.

It is an arithmetic number, because the mean of its divisors is an integer number (8896746976).

Almost surely, 2^71601703749 is an apocalyptic number.

It is an amenable number.

71601703749 is a deficient number, since it is larger than the sum of its proper divisors (35159259963).

71601703749 is a wasteful number, since it uses less digits than its factorization.

71601703749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256636968 (or 256636965 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The spelling of 71601703749 in words is "seventy-one billion, six hundred one million, seven hundred three thousand, seven hundred forty-nine".