71161708961 has 16 divisors (see below), whose sum is σ = 82779874560. Its totient is φ = 59912986560.

The previous prime is 71161708949. The next prime is 71161708979. The reversal of 71161708961 is 16980716117.

It is a happy number.

It is not a de Polignac number, because 71161708961 - 2⁶ = 71161708897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71161708901) 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, 132446 + ... + 399831.

It is an arithmetic number, because the mean of its divisors is an integer number (5173742160).

Almost surely, 2^71161708961 is an apocalyptic number.

71161708961 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

71161708961 is a deficient number, since it is larger than the sum of its proper divisors (11618165599).

71161708961 is a wasteful number, since it uses less digits than its factorization.

71161708961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532624.

The product of its (nonzero) digits is 127008, while the sum is 47.

The spelling of 71161708961 in words is "seventy-one billion, one hundred sixty-one million, seven hundred eight thousand, nine hundred sixty-one".