71680037961 has 16 divisors (see below), whose sum is σ = 111766882304. Its totient is φ = 40007462544.

The previous prime is 71680037921. The next prime is 71680037981. The reversal of 71680037961 is 16973008617.

It is a happy number.

It is not a de Polignac number, because 71680037961 - 2⁹ = 71680037449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71680037961.

It is not an unprimeable number, because it can be changed into a prime (71680037921) 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, 39689041 + ... + 39690846.

It is an arithmetic number, because the mean of its divisors is an integer number (6985430144).

Almost surely, 2^71680037961 is an apocalyptic number.

It is an amenable number.

71680037961 is a deficient number, since it is larger than the sum of its proper divisors (40086844343).

71680037961 is a wasteful number, since it uses less digits than its factorization.

71680037961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79379940.

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 71680037961 in words is "seventy-one billion, six hundred eighty million, thirty-seven thousand, nine hundred sixty-one".