71721162046 has 16 divisors (see below), whose sum is σ = 107787607200. Its totient is φ = 35792021248.

The previous prime is 71721162041. The next prime is 71721162047. The reversal of 71721162046 is 64026112717.

It is a super-2 number, since 2×71721162046² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71721161996 and 71721162014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71721162041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508246 + ... + 2536678.

It is an arithmetic number, because the mean of its divisors is an integer number (6736725450).

Almost surely, 2^71721162046 is an apocalyptic number.

71721162046 is a deficient number, since it is larger than the sum of its proper divisors (36066445154).

71721162046 is a wasteful number, since it uses less digits than its factorization.

71721162046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30803.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 71721162046 in words is "seventy-one billion, seven hundred twenty-one million, one hundred sixty-two thousand, forty-six".